D. Chitty. GECCO '07: Proceedings of the 9th annual conference on
Genetic and evolutionary computation, 2, page 1566--1573. London, ACM Press, (7-11 July 2007)
J. Daida. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 1, page 799--806. Seattle, Washington, USA, ACM Press, (8-12 July 2006)