N. McPhee, R. Poli, and J. Rowe. Proceedings of the 2001 Congress on Evolutionary
Computation CEC2001, page 1078--1085. COEX, World Trade Center, 159 Samseong-dong,
Gangnam-gu, Seoul, Korea, IEEE Press, (27-30 May 2001)
S. Dignum, and R. Poli. GECCO '07: Proceedings of the 9th annual conference on
Genetic and evolutionary computation, 2, page 1588--1595. London, ACM Press, (7-11 July 2007)