Leslie Ann Goldberg, Klaus Jansen, R. Ravi, José D. P. Rolim: Approximation, Randomization, and Combinatorial Optimization. Algorithms and Techniques - 14th International Workshop, APPROX 2011, and 15th International Workshop, RANDOM 2011, Princeton, NJ, USA, August 17-19, 2011. Proceedings. Lecture Notes in Computer Science 6845, Springer 2011, ISBN 978-3-642-22934-3