H. Iba, T. Sato, and H. de Garis. 1995 IEEE Conference on Evolutionary Computation, 1, page 97--102. Perth, Australia, IEEE Press, (29 November - 1 December 1995)
S. Christensen, and F. Oppacher. GECCO '07: Proceedings of the 9th annual conference on
Genetic and evolutionary computation, 2, page 1574--1579. London, ACM Press, (7-11 July 2007)