Randeep Bhatia, Julia Chuzhoy, Ari Freund, Joseph Naor. Algorithmic Aspects of Bandwidth Trading. In Jos C. M. Baeten, Jan Karel Lenstra, Joachim Parrow, Gerhard J. Woeginger, editors, Automata, Languages and Programming, 30th International Colloquium, ICALP 2003, Eindhoven, The Netherlands, June 30 - July 4, 2003. Proceedings. Volume 2719 of Lecture Notes in Computer Science, pages 751-766, Springer, 2003.