Hybrid Metaheuristics 4th International Workshop,HM 2007, Dortmund, Germany, October 8-9, 2007, Proceedings - Bartz-Beielstein, Thomas; Blesa, Maria J.; Blum, Christian; Naujoks, Boris; Roli, Andrea; Rudolph, Günther; Sampels, Michael (Theoretical Computer Science and General Issues,, 2007)