Danny Z. Chen, Jian Li, Hongyu Liang, Haitao Wang. Matroid and Knapsack Center Problems. In Michel X. Goemans, José R. Correa, editors, Integer Programming and Combinatorial Optimization - 16th International Conference, IPCO 2013, Valparaíso, Chile, March 18-20, 2013. Proceedings. Volume 7801 of Lecture Notes in Computer Science, pages 110-122, Springer, 2013. [doi]
Abstract is missing.