Parallel Problem Solving from Nature - PPSN XII 12th International Conference, Taormina, Italy, September 1-5, 2012, Proceedings, Part II - Coello Coello,Carlos A.; Cutello,Vincenzo; Deb,Kalyanmoy; Forrest,Stephanie; Nicosia,Giuseppe; Pavone,Mario (Lecture Notes in Computer Science / Theoretical Computer Science and General Issues Ser.)