R. Poli, W. Langdon, and N. McPhee. Published via http://lulu.com and freely
available at
http://www.gp-field-guide.org.uk, (2008)(With contributions by J. R. Koza).
S. Luke. GECCO 2005: Proceedings of the 2005 conference on
Genetic and evolutionary computation, 1, page 91--97. Washington DC, USA, ACM Press, (25-29 June 2005)
W. Langdon, and W. Banzhaf. Late Breaking Papers at the 2004 Genetic and
Evolutionary Computation Conference, Seattle, Washington, USA, AAAI, (26 July 2004)
D. Kim. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 1, page 151--158. Seattle, Washington, USA, ACM Press, (8-12 July 2006)