R. Salustowicz, and J. Schmidhuber. Machine Learning: ECML-97, volume 1224 of Lecture Notes in Artificial Intelligence, page 213--220. Springer-Verlag, (1997)
A. Almal, A. Mitra, R. Datar, P. Lenehan, D. Fry, R. Cote, and W. Worzel. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 1, page 239--246. Seattle, Washington, USA, ACM Press, (8-12 July 2006)