Ari Freund, Joseph Naor. Approximating the Advertisement Placement Problem. In William Cook, Andreas S. Schulz, editors, Integer Programming and Combinatorial Optimization, 9th International IPCO Conference, Cambridge, MA, USA, May 27-29, 2002, Proceedings. Volume 2337 of Lecture Notes in Computer Science, pages 415-424, Springer, 2002. [doi]
Abstract is missing.