Liam Roditty. On the ::::K::::-simple shortest paths problem in weighted directed graphs. In Nikhil Bansal, Kirk Pruhs, Clifford Stein, editors, Proceedings of the Eighteenth Annual ACM-SIAM Symposium on Discrete Algorithms, SODA 2007, New Orleans, Louisiana, USA, January 7-9, 2007. pages 920-928, SIAM, 2007. [doi]