J. Koza, L. Jones, M. Keane, and M. Streeter. Genetic Programming Theory and Practice II, chapter 8, Springer, Ann Arbor, pages missing?.(13-15 May 2004)
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)
G. Barlow, and C. Oh. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 1, page 135--142. Seattle, Washington, USA, ACM Press, (8-12 July 2006)
A. Surkan, and A. Khuskivadze. The 2002 NASA/DoD Conference on Evolvable Hardware, page 186--187. Long Beach, California, IEEE Computer Society, (12-14 July 2001)