The p-hub center allocation problem

@article{Campbell2007ThePC,
  title={The p-hub center allocation problem},
  author={Ann Melissa Campbell and Timothy J. Lowe and Xiang Lin},
  journal={European Journal of Operational Research},
  year={2007},
  volume={176},
  pages={819-835}
}
The p-hub center problem is to locate p hubs and to allocate non-hub nodes to hub nodes such that the maximum travel time (or distance) between any origin–destination pair is minimized. We address the p-hub center allocation problem, a subproblem of the location problem, where hub locations are given. We present complexity results and IP formulations for several versions of the problem. We establish that some special cases are polynomially solvable. 2005 Elsevier B.V. All rights reserved. 

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