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  1. Published

    A reinforcement learning hyper-heuristic for water distribution network optimisation

    Ahmed, A. O. M., Osman, S. M. Y., Yousif, T. E. H. & Kheiri, A., 17/05/2021, 2020 International Conference on Computer, Control, Electrical, and Electronics Engineering (ICCCEEE). IEEE, 4 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  2. Published

    Iterated Chvatal-Gomory cuts and the geometry of numbers

    Aliev, I. & Letchford, A., 2014, In: SIAM Journal on Optimization. 24, 3, p. 1294-1312 19 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  3. Published

    A polyhedral approach to the single row facility layout problem

    Amaral, A. R. S. & Letchford, A., 10/2013, In: Mathematical Programming. 141, 1-2, p. 453-477 25 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  4. Published

    A new lower bound for the minimum linear arrangement of a graph

    Amaral, A., Caprara, A., Letchford, A. N. & Salazar-Gonzalez, J.-J., 20/02/2008, In: Electronic Notes in Discrete Mathematics. 30, p. 87-92

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  5. Published

    Crowdsourced Delivery—A Dynamic Pickup and Delivery Problem with Ad Hoc Drivers

    Arslan, A., Agatz, N., Kroon, L. & Zuidwijk, R., 31/01/2019, In: Transportation Science. 53, 1, p. 222-235 14 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  6. Published

    Operational Strategies for on-demand personal shopper services

    Arslan, A., Agatz, N. & Klapp, M. A., 30/09/2021, In: Transportation Research Part C: Emerging Technologies . 130, 17 p., 103320.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  7. Published

    Operational strategies for on-demand delivery services

    Arslan, A., 21/11/2019, 149 p.

    Research output: Thesis › Doctoral Thesis

  8. Published

    A State Transition MIP Formulation for the Unit Commitment Problem

    Atakan, S., Lulli, G. & Sen, S., 01/2018, In: IEEE Transactions on Power Systems. 33, 1, p. 736-748 13 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  9. Published

    Enhancing the performance of one-way electric carsharing systems through the optimum deployment of fast chargers

    Bekli, S., Boyacı, B. & Zografos, K. G., 31/10/2021, In: Transportation Research Part B: Methodological. 152, p. 118-139 22 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  10. Published

    An Optimization Framework for One-way Carsharing Systems with User Acceptance Probabilities

    Bekli, R., Boyacı, B. & Zografos, K. G., 2/09/2024. 4 p.

    Research output: Contribution to conference - Without ISBN/ISSN › Abstract › peer-review

  11. Published

    Using ℓp-norms for fairness in combinatorial optimisation

    Bektas, T. & Letchford, A., 1/08/2020, In: Computers and Operations Research. 120, 11 p., 104975.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  12. Published

    A faster exact method for solving the robust multi-mode resource-constrained project scheduling problem

    Bold, M. & Goerigk, M., 30/09/2022, In: Operations Research Letters. 50, 5, p. 581-587 7 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  13. Published

    Matheuristics: survey and synthesis

    Boschetti, M., Letchford, A. & Maniezzo, V., 30/11/2023, In: International Transactions in Operational Research. 30, 6, p. 2840-2866 27 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  14. Published

    Investigating the effect of temporal and spatial flexibility on the performance of one-way electric carsharing systems

    Boyacı, B. & Zografos, K. G., 1/11/2019, In: Transportation Research Part B: Methodological. 129, p. 244-272 29 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  15. Published

    Vehicle routing on road networks: how good is Euclidean approximation?

    Boyacı, B., Dang, T. & Letchford, A., 1/05/2021, In: Computers and Operations Research. 129, 13 p., 105197.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  16. Published

    On matchings, T-joins and arc routing problems

    Boyacı, B., Dang, T. & Letchford, A., 31/01/2022, In: Networks. 79, 1, p. 20-31 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  17. Published

    A Matheuristic Approach for Finding Effective Base Locations and Team Configurations for North West Air Ambulance

    Boyacı, B., Nayeem, M. A. & Kheiri, A., 8/07/2021, GECCO '21: Proceedings of the Genetic and Evolutionary Computation Conference Companion. Chicano, F. (ed.). New York: ACM, p. 1817-1824 8 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  18. Published

    Improving a constructive heuristic for the general routing problem

    Boyacı, B., Dang, T. & Letchford, A., 31/01/2023, In: Networks. 81, 1, p. 93-106 14 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  19. Published

    Fast upper and lower bounds for a large-scale real-world arc routing problem

    Boyacı, B., Dang, T. & Letchford, A., 31/01/2023, In: Networks. 81, 1, p. 107-124 18 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  20. Published

    Handling User-based Relocations in One-way Carsharing Systems Considering User Acceptance Rates

    Boyacı, B., Bekli, S. & Zografos, K. G., 28/04/2023.

    Research output: Contribution to conference - Without ISBN/ISSN › Abstract › peer-review

  21. Published

    Unbounded convex sets for non-convex mixed-integer quadratic programming

    Burer, S. & Letchford, A., 1/02/2014, In: Mathematical Programming. 143, 1-2, p. 231-256 26 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  22. Published

    Application of selection hyper-heuristics to the simultaneous optimisation of turbines and cabling within an offshore windfarm

    Butterwick, T., Kheiri, A., Lulli, G., Gromicho, J. & Kreeft, J., 31/05/2023, In: Renewable Energy. 208, p. 1-16 16 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  23. Published

    On the separation of maximally violated mod-k cuts

    Caprara, A., Fischetti, M. & Letchford, A. N., 1999, Integer Programming and Combinatorial Optimization: Proceedings of the 7th International IPCO Conference. Cornuéjols, G., Burkard, R. E. & Woeginger, G. J. (eds.). Berlin: Springer, p. 87-98 12 p. (Lecture Notes in Computer Science ; vol. 1610).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review

  24. Published

    Lower bounds for the minimum linear arrangement of a graph

    Caprara, A., Letchford, A. & Salazar Gonzalez, J. J., 1/08/2010, In: Electronic Notes in Discrete Mathematics. 36, p. 843-849 7 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  25. Published

    On scenario aggregation to approximate robust combinatorial optimization problems

    Chassein, A. & Goerigk, M., 10/2018, In: Optimization Letters. 12, 7, p. 1523-1533 11 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  26. E-pub ahead of print

    Compromise Solutions for Robust Combinatorial Optimization with Variable-Sized Uncertainty

    Chassein, A. & Goerigk, M., 5/02/2018, (E-pub ahead of print) In: European Journal of Operational Research. 269, 2, p. 544-555 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  27. Published

    A survey on exact algorithms for the maximum flow and minimum-cost flow problems

    Cruz Mejía, O. & Letchford, A., 30/09/2023, In: Networks. 82, 2, p. 167-176 10 p.

    Research output: Contribution to Journal/Magazine › Review article › peer-review

  28. Published

    A Multi-Objective Integer Approach for Optimizing Trajectory Based Operations (TBO)

    Dal Sasso, V., Djeumou Fomeni, F., Lulli, G., Murgese, G. & Zografos, K. G., 8/01/2018.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  29. Published

    Incorporating Stakeholders’ priorities and preferences in 4D trajectory optimization

    Dal Sasso, V., Djeumou Fomeni, F., Lulli, G. & Zografos, K. G., 11/2018, In: Transportation Research Part B: Methodological. 117, A, p. 594-609 16 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  30. Published

    Planning efficient 4D trajectories in Air Traffic Flow Management

    Dal Sasso, V., Djeumou Fomeni, F., Lulli, G. & Zografos, K. G., 16/07/2019, In: European Journal of Operational Research. 276, 2, p. 676-687 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  31. Published

    A dynamic programming heuristic for the quadratic knapsack problem

    Djeumou Fomeni, F. & Letchford, A., 02/2014, In: INFORMS Journal on Computing. 26, 1, p. 173-182 10 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  32. Published

    Cutting planes for RLT relaxations of mixed 0-1 polynomial programs

    Djeumou Fomeni, F., Kaparis, K. & Letchford, A., 2015, In: Mathematical Programming. 151, 2, p. 639–658 20 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  33. Published

    A cut-and-branch algorithm for the quadratic knapsack problem

    Djeumou Fomeni, F., Kaparis, K. & Letchford, A., 31/05/2022, In: Discrete Optimization. 44, 2, 18 p., 100579.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  34. Published

    Mixed uncertainty sets for robust combinatorial optimization

    Dokka, T., Goerigk, M. & Roy, R., 1/09/2020, In: Optimization Letters. 14, p. 1323–1337 15 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  35. Published

    On the complexity of surrogate and group relaxation for integer linear programs

    Dokka, T., Letchford, A. & Mansoor, H., 31/07/2021, In: Operations Research Letters. 49, 4, p. 530-534 5 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  36. Published

    Revisiting surrogate relaxation for the multidimensional knapsack problem

    Dokka, T., Letchford, A. & Mansoor, H., 30/11/2022, In: Operations Research Letters. 50, 6, p. 674-678 5 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  37. Published

    Multi-level bottleneck assignment problems: Complexity and sparsity-exploiting formulations

    Dokka, T. & Goerigk, M., 30/06/2023, In: Computers and Operations Research. 154, 12 p., 106213.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  38. Unpublished

    Non-parametric dynamic pricing: a non-adversarial robust optimization approach

    Dokka Venkata Satyanaraya, T., Jacko, P. & Aslam, W., 2018, (Unpublished) Lancaster: Lancaster University Management School, (Lancaster University Management School Working Paper ; vol. 2018, no. 3).

    Research output: Working paper

  39. Published

    Improving Abatement Levels and Welfare by Coarse Correlation in an Environmental Game

    Dokka Venkata Satyanaraya, T., Moulin, H., Ray, I. & Sen Gupta, S., 05/2019, Lancaster: Lancaster University, Department of Economics, (Economics Working Papers Series).

    Research output: Working paper

  40. Published

    An Efficient Approach to Distributionally Robust Network Capacity Planning

    Dokka Venkata Satyanaraya, T., Garuba, F., Goerigk, M. & Jacko, P., 9/04/2020, In: arXiv.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  41. Published

    Equilibrium Design by Coarse Correlation in Quadratic Games

    Dokka Venkata Satyanaraya, T., Moulin, H., Ray, I. & Sen Gupta, S., 31/07/2020, Lancaster : Lancaster University, Department of Economics, (Economics Working Papers Series).

    Research output: Working paper

  42. Published

    Recent Advances in Selection Hyper-heuristics

    Drake, J. H., Kheiri, A., Özcan, E. & Burke, E. K., 1/09/2020, In: European Journal of Operational Research. 285, 2, p. 405-428 24 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  43. Published

    Polyhedral theory for arc routing problems

    Eglese, R. W. & Letchford, A. N., 2000, Arc Routing : Theory, Solutions and Applications. Dordrecht: Kluwer Academic Publishers, p. 199-230 32 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review

  44. Published

    Disruption management in vehicle routing and scheduling for road freight transport: a review

    Eglese, R. W. & Zambirinis, S., 04/2018, In: TOP. 26, 1, p. 1-17 17 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  45. Published

    General routing problem

    Eglese, R. & Letchford, A., 4/09/2008, Encyclopedia of Optimization. Floudas, C. & Pardalos, P. (eds.). 2nd ed. New York: Springer, p. 1252-1254 3 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Entry for encyclopedia/dictionary

  46. Published

    Arc routing problems

    Eglese, R. & Letchford, A., 10/02/2024, Encyclopedia of Optimization. Pardalos, P. & Prokopyev, O. (eds.). 3rd ed. Cham: Springer, 6 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Entry for encyclopedia/dictionary

  47. Published

    Convergence and polynomiality of primal-dual interior-point algorithms for linear programming with selective addition of inequalities

    Engau, A. & Anjos, M. F., 12/2017, In: Optimization. 66, 12, p. 2063-2086 24 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  48. Published

    Proper efficiency and tradeoffs in multiple criteria and stochastic optimization

    Engau, A., 2017, In: Mathematics of Operations Research. 42, 1, p. 119-134 16 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  49. Published

    Definition and characterization of Geoffrion proper efficiency for real vector optimization with infinitely many criteria

    Engau, A., 05/2015, In: Journal of Optimization Theory and Applications. 165, 2, p. 439-457 19 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  50. Published

    Multicriteria modeling and tradeoff analysis for oil load dispatch and hauling operations at Noble Energy

    Engau, A., 03/2015, In: Optimization and Engineering. 16, 1, p. 73-101 29 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  51. Published

    Some experiences with solving semidefinite programming relaxations of binary quadratic optimization models in computational biology

    Engau, A., 27/03/2014, In: Asia-Pacific Journal of Operational Research. 31, 4, 18 p., 1450022.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  52. Published

    A two-level graph partitioning problem arising in mobile wireless communications

    Fairbrother, J., Letchford, A. N. & Briggs, K., 04/2018, In: Computational Optimization and Applications. 69, 3, p. 653-676 24 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  53. Published

    Projection results for the k-partition problem

    Fairbrother, J. & Letchford, A. N., 8/11/2017, In: Discrete Optimization. 26, p. 97-111 15 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  54. Published

    On the Development of a Fair and Efficient Slot Scheduling Mechanism at Congested Airports

    Fairbrother, J. & Zografos, K. G., 7/01/2018.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  55. Published

    On the dynamic allocation of assets subject to failure

    Ford, S., Atkinson, M. P., Glazebrook, K. & Jacko, P., 1/07/2020, In: European Journal of Operational Research. 284, 1, p. 227-239 13 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  56. Published

    A compact variant of the QCR method for quadratically constrained quadratic 0-1 programs

    Galli, L. & Letchford, A., 04/2014, In: Optimization Letters. 8, 4, p. 1213-1224 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  57. Published

    On the Lovász theta function and some variants

    Galli, L. & Letchford, A. N., 27/07/2017, In: Discrete Optimization. 25, p. 159-174 16 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  58. Published

    New valid inequalities and facets for the simple plant location problem

    Galli, L., Letchford, A. N. & Miller, S., 16/09/2018, In: European Journal of Operational Research. 269, 3, p. 824-833 10 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  59. Published

    A binarisation heuristic for non-convex quadratic programming with box constraints

    Galli, L. & Letchford, A. N., 1/09/2018, In: Operations Research Letters. 46, 5, p. 529-533 5 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  60. Published

    A separation algorithm for the simple plant location problem

    Galli, L. & Letchford, A., 31/07/2021, In: Operations Research Letters. 49, 4, p. 610-615 6 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  61. Published

    On upper bounds for the multiple knapsack assignment problem

    Galli, L. & Letchford, A., 1/05/2024, In: Operations Research Letters. 54, 6 p., 107104.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  62. Forthcoming

    On a hierarchy of polytopes for integer quadratic programming

    Galli, L. & Letchford, A., 8/05/2025, (Accepted/In press) Mathematics, Algorithms and the Art and Science of Decision-Making. Barbato, M., Bianchessi, N. & Boggio Tomasaz, A. (eds.). Springer

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review

  63. Published

    Robust Network Capacity Expansion with Non-linear Costs

    Garuba, F., Goerigk, M. & Jacko, P., 15/11/2019, 19th Symposium on Algorithmic Approaches for Transportation Modelling, Optimization, and Systems, ATMOS 2019. Cacchiani, V. & Marchetti-Spaccamela, A. (eds.). Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik, p. 5.1-5.13 13 p. (OASICS; vol. 75).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  64. Published

    A Comparison of Models for Uncertain Network Design

    Garuba, F., Goerigk, M. & Jacko, P., 23/06/2019. 20 p.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  65. Published

    A Comparison of Data-Driven Uncertainty Sets for Robust Network Design

    Garuba, F., Goerigk, M. & Jacko, P., 23/03/2020, In: arXiv.

    Research output: Contribution to Journal/Magazine › Journal article

  66. Published

    Robust and stochastic approaches to network capacity design under demand uncertainty

    Garuba, F., 06/2020, Lancaster University. 180 p.

    Research output: Thesis › Doctoral Thesis

  67. Published

    A comparison of discrete and polyhedral uncertainty sets for robust network design

    Garuba, F., Goerigk, M. & Jacko, P., 2020

    Research output: Other contribution

  68. Published

    Ellipsoidal relaxations of the stable set problem: theory and algorithms

    Giandomenico, M., Letchford, A., Rossi, F. & Smriglio, S., 1/08/2015, In: SIAM Journal on Optimization. 25, 3, p. 1944-1963 20 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  69. Published

    Approximating the Lovász θ function with the subgradient method

    Giandomenico, M., Letchford, A. N., Rossi, F. & Smriglio, S., 5/06/2013, In: Electronic Notes in Discrete Mathematics. 41, p. 157-164 8 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  70. Published

    A Novel Implementation of Q-Learning for the Whittle Index

    Gibson, L. J., Jacko, P. & Nazarathy, Y., 8/12/2021, Performance Evaluation Methodologies and Tools - 14th EAI International Conference, VALUETOOLS 2021, Proceedings. Zhao, Q. & Xia, L. (eds.). Cham: Springer, p. 154-170 17 p. (Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST; vol. 404 LNICST).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  71. E-pub ahead of print

    Representative scenario construction and preprocessing for robust combinatorial optimization problems

    Goerigk, M. & Hughes, M., 29/10/2018, (E-pub ahead of print) In: Optimization Letters. 15 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  72. Published

    Generating hard instances for robust combinatorial optimization

    Goerigk, M. & Maher, S. J., 1/01/2020, In: European Journal of Operational Research. 280, 1, p. 34-45 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  73. Published

    Adaptive policies for perimeter surveillance problems

    Grant, J. A., Leslie, D. S., Glazebrook, K., Szechtman, R. & Letchford, A., 16/05/2020, In: European Journal of Operational Research. 283, 1, p. 265-278 14 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  74. Published

    A Largest Empty Hypersphere Metaheuristic for Robust Optimisation with Implementation Uncertainty

    Hughes, M., Goerigk, M. & Wright, M. B., 03/2019, In: Computers and Operations Research. 103, p. 64-80 17 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  75. Published

    Particle Swarm Metaheuristics for Robust Optimisation with Implementation Uncertainty

    Hughes, M., Goerigk, M. & Dokka Venkata Satyanaraya, T., 1/10/2020, In: Computers and Operations Research. 122, 21 p., 104998.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  76. Published

    Metaheuristics for black-box robust optimisation problems

    Hughes, M., 16/07/2020, Lancaster University. 175 p.

    Research output: Thesis › Doctoral Thesis

  77. Published

    Automatic generation of algorithms for robust optimisation problems using Grammar-Guided Genetic Programming

    Hughes, M., Goerigk, M. & Dokka, T., 30/09/2021, In: Computers and Operations Research. 133, 25 p., 105364.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  78. Published

    Routing with too much information?

    Hyytiä, E., Jacko, P. & Righter, R., 3/05/2022, In: Queueing Systems. 100, 3-4, p. 441-443 3 p., 3-4.

    Research output: Contribution to Journal/Magazine › Letter › peer-review

  79. Forthcoming

    An analysis of trajectory centered ATFM with airspace users’ preference scores

    Jiang, Y., De Giovanni, L., Lancia, C. & Lulli, G., 6/04/2024, (Accepted/In press). 8 p.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  80. Forthcoming

    Choice-Driven Multi-Period Network Design for Advanced Air Mobility

    Jiang, Y., Zhou, X., Lulli, G., Zhong, S. & Jiang, Y., 23/03/2025, (Accepted/In press).

    Research output: Contribution to conference - Without ISBN/ISSN › Abstract › peer-review

  81. Published

    A note on the 2-circulant inequalities for the max-cut problem

    Kaparis, K. & Letchford, A. N., 07/2018, In: Operations Research Letters. 46, 4, p. 443-447 5 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  82. Published

    Generalised 2-circulant inequalities for the max-cut problem

    Kaparis, K., Letchford, A. & Mourtos, I., 31/03/2022, In: Operations Research Letters. 50, 2, p. 122-128 7 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  83. Published

    On cut polytopes and graph minors

    Kaparis, K., Letchford, A. & Mourtos, I., 30/11/2023, In: Discrete Optimization. 50, 100807.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  84. Published

    Multi-Objective, Multi-Stakeholder Airport Slot Scheduling Considering Expected Delays

    Katsigiannis, F. A. & Zografos, K. G., 24/10/2021.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper

  85. Published

    A Multi-Objective framework for investigating airport schedule efficiency, fairness, flexibility, and regularity trade-offs

    Kerama, T. & Zografos, K. G., 10/05/2022.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  86. Published

    A Modelling Framework for Solving the Network-Wide Airport Slot Allocation Problem

    Keskin Ozel, M. & Zografos, K. G., 19/06/2022.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  87. Published

    Modelling and solving the combined inventory routing problem with risk consideration

    Kheiri, A. & Zografos, K. G., 13/07/2019, p. 57-58. 2 p.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  88. Published

    Exact and hyper-heuristic solutions for the distribution-installation problem from the VeRoLog 2019 challenge

    Kheiri, A., Ahmed, L., Boyacı, B., Gromicho, J., Mumford, C., Özcan, E. & Dirikoc, A. S., 1/09/2020, In: Networks. 76, 2, p. 294-319 26 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  89. Published

    A hyper-heuristic approach based upon a hidden Markov model for the multi-stage nurse rostering problem

    Kheiri, A., Gretsista, A., Keedwell, E., Lulli, G., Epitropakis, M. & Burke, E., 1/06/2021, In: Computers and Operations Research. 130, 14 p., 105221.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  90. Published

    Compact formulations of the Steiner traveling salesman problem and related problems

    Letchford, A. & Nasiri, S. D., 2013, In: European Journal of Operational Research. 228, 1, p. 83-92 10 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  91. Published

    An aggressive reduction scheme for the simple plant location problem

    Letchford, A. & Miller, S., 1/05/2014, In: European Journal of Operational Research. 234, 3, p. 674-682 9 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  92. Published

    Pricing routines for vehicle routing with time windows on road networks

    Letchford, A. & Nasiri, S. D., 2014, Lancaster University: The Department of Management Science, 20 p. (Lancaster University Management School Working Paper Series; vol. 2014, no. 2).

    Research output: Working paper

  93. Published

    Pricing routines for vehicle routing with time windows on road networks

    Letchford, A., Nasiri, S. D. & Oukil, A., 11/2014, In: Computers and Operations Research. 51, p. 331-337 7 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  94. Published

    A new separation algorithm for the Boolean quadric and cut polytopes

    Letchford, A. & Sorensen, M. M., 2/08/2014, In: Discrete Optimization. 14, p. 61-71 11 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  95. Published

    Stronger multi-commodity flow formulations of the capacitated vehicle routing problem

    Letchford, A. & Salazar Gonzalez, J. J., 1/08/2015, In: European Journal of Operational Research. 244, 3, p. 730-738 9 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  96. Published

    The Steiner travelling salesman problem with correlated costs

    Letchford, A. & Nasiri, S., 16/08/2015, In: European Journal of Operational Research. 245, 1, p. 62–69 8 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  97. Published

    Computing upper bounds for the stable set problem using Lagrangian relaxation

    Letchford, A., 05/2013.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  98. Published

    Stronger multi-commodity flow formulations of the (capacitated) sequential ordering problem

    Letchford, A. & Salazar Gonzalez, J. J., 16/05/2016, In: European Journal of Operational Research. 251, 1, p. 74-84 11 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  99. Published

    Strengthening Chvátal-Gomory cuts for the stable set problem

    Letchford, A. N., Marzi, F., Rossi, F. & Smriglio, S., 10/09/2016, Combinatorial Optimization: 4th International Symposium, ISCO 2016, Vietri sul Mare, Italy, May 16-18, 2016, Revised Selected Papers. Cerulli, R., Fujishige, S. & Mahjoub, A. R. (eds.). Berlin: Springer, p. 201-212 12 p. (Lecture Notes in Computer Science; vol. 9849).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review

  100. Published

    Some hard combinatorial optimisation problems from mobile wireless communications

    Letchford, A. N., 18/05/2016. 2 p.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

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