Jiangzhuo Chen, Robert D. Kleinberg, László Lovász, Rajmohan Rajaraman, Ravi Sundaram, Adrian Vetta. (Almost) tight bounds and existence theorems for confluent flows. In László Babai, editor, Proceedings of the 36th Annual ACM Symposium on Theory of Computing, Chicago, IL, USA, June 13-16, 2004. pages 529-538, ACM, 2004. [doi]
Abstract is missing.