Günther R. Raidl, Jakob Puchinger, Christian Blum. Metaheuristic Hybrids. Chapter in Handbook of Metaheuristics (Michel Gendreau and Jean Yves Potvin), pages 385-417, 2019, Springer. (Note: previous technical report version at https://www.ac.tuwien.ac.at/files/pub/raidl-19.pdf)