C. Chang, R. Stachowitz, and J. Combs. Tools for Artificial Intelligence, 1990.,Proceedings of the 2nd International
IEEE Conference on, (November 1990)
J. Smith, III. GECCO 2005: Proceedings of the 2005 conference on
Genetic and evolutionary computation, 2, page 1737--1744. Washington DC, USA, ACM Press, (25-29 June 2005)