Henry Lin, Tim Roughgarden, Éva Tardos. A stronger bound on Braess s Paradox. In J. Ian Munro, editor, Proceedings of the Fifteenth Annual ACM-SIAM Symposium on Discrete Algorithms, SODA 2004, New Orleans, Louisiana, USA, January 11-14, 2004. pages 340-341, SIAM, 2004. [doi]
Abstract is missing.