Approximation, Randomization, and Combinatorial Optimization. Algorithms and Techniques 10th International Workshop, APPROX 2007, and 11th International Workshop, RANDOM 2007, Princeton, NJ, USA, August 20-22, 2007. Proceedings - Charikar, Moses; Jansen, Klaus; Reingold, Omer; Rolim, José D. P. (Springer Berlin Heidelberg, 2007)