Lisa Fleischer, Michel X. Goemans, Vahab S. Mirrokni, Maxim Sviridenko. Tight approximation algorithms for maximum general assignment problems. In Proceedings of the Seventeenth Annual ACM-SIAM Symposium on Discrete Algorithms, SODA 2006, Miami, Florida, USA, January 22-26, 2006. pages 611-620, ACM Press, 2006. [doi]
Abstract is missing.