Günther R. Raidl, Jakob Puchinger, Christian Blum. Metaheuristic Hybrids. Chapter in Handbook of Metaheuristics (Michel Gendreau and Jean Yves Potvin), volume 146 of International Series in Operations Research & Management Science, pages 469-496, 2010, Springer. (Note: previous technical report version at https://www.ac.tuwien.ac.at/files/pub/raidl-08a.pdf)