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. Castillo, K. Marshall, J. Green, and A. Kordon. Genetic and Evolutionary Computation -- GECCO-2003, volume 2724 of LNCS, page 1975--1985. Chicago, Springer-Verlag, (12-16 July 2003)
F. Castillo, K. Marshall, J. Green, and A. Kordon. GECCO 2002: Proceedings of the Genetic and
Evolutionary Computation Conference, page 1043--1047. New York, Morgan Kaufmann Publishers, (9-13 July 2002)