R. Aviv, Z. Erlich, and G. Ravid. The 3rd IEEE International Conference on Advanced Learning Technologies, 2003. Proceedings, page 145 -- 149. (July 2003)
M. Smith, and L. Bull. GECCO '07: Proceedings of the 9th annual conference on
Genetic and evolutionary computation, 2, page 1694--1701. London, ACM Press, (7-11 July 2007)