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).
W. Langdon, R. Poli, N. McPhee, and J. Koza. Computational Intelligence: A Compendium, volume 115 of Studies in Computational Intelligence (SCI), chapter 22, Springer-Verlag, Due: 7 May 2008.(2008)
A. Arcuri. ICSE Companion '08: Companion of the 30th
international conference on Software engineering, page 1003--1006. Leipzig, Germany, ACM, (2008)Doctoral symposium session.