A. Kordon, F. Castillo, G. Smits, and M. Kotanchek. Genetic Programming Theory and Practice III, volume 9 of Genetic Programming, chapter 16, Springer, Ann Arbor, (12-14 May 2005)
F. Chapelle, and P. Bidaud. IEEE International Conference on Robotics and
Automation (ICRA'01), 4, page 3364--3369. Seoul, Korea, IEEE, (21-28 May 2001)
F. Castillo, A. Kordon, G. Smits, B. Christenson, and D. Dickerson. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 2, page 1613--1620. Seattle, Washington, USA, ACM Press, (8-12 July 2006)
F. Castillo, A. Kordon, and G. Smits. Genetic Programming Theory and Practice IV, volume 5 of Genetic and Evolutionary Computation, chapter 2, Springer, Ann Arbor, (11-13 May 2006)