Fabrizio Grandoni, Thomas Rothvoß. Approximation Algorithms for Single and Multi-Commodity Connected Facility Location. In Oktay Günlük, Gerhard J. Woeginger, editors, Integer Programming and Combinatoral Optimization - 15th International Conference, IPCO 2011, New York, NY, USA, June 15-17, 2011. Proceedings. Volume 6655 of Lecture Notes in Computer Science, pages 248-260, Springer, 2011. [doi]
Abstract is missing.