Parallel Problem Solving from Nature - PPSN VIII : 8th International Conference, Birmingham, UK, September 18-22, 2004, Proceedings - Xin Yao, Edmund K. Burke, José A. Lozano, Jim Smith, Juan Julián Merelo-Guervós, John A. Bullinaria, Jonathan E. Rowe, Peter Ti.o, Ata Kabán, . Hans-Paul Schwefel ((Lecture Notes in Computer Science))