1. A 3-approximation for facility location with uniform capacities;Aggarwal,2010
2. Network Flows — Theory, Algorithms and Applications;Ahuja,1993
3. Hyung-Chan An, Mohit Singh, Svensson, LP-based algorithms for capacitated facility location, 2014. http://arxiv.org/abs/1407.3263.
4. Reductions, completeness and the hardness of approximability;Ausiello;European J. Oper. Res.,2006
5. A 5-approximation for capacitated facility location;Bansal,2012