Approximation, Randomization and Combinatorial Optimization. Algorithms and Techniques - International Workshop on Approximation Algorithms for Combinatorial Optimizational Problems; Chekuri, Chandra; Kanade, Takeo; Jansen, Klaus; Rolim, JosÃ© D.P.; Trevisan, Luca; Rolim, José D. P. (Springer Berlin / Heidelberg, 2005)