S. Luke, and L. Spector. Genetic Programming 1996: Proceedings of the First
Annual Conference, page 150--156. Stanford University, CA, USA, MIT Press, (28--31 July 1996)
R. Crawford-Marks, and L. Spector. GECCO 2002: Proceedings of the Genetic and
Evolutionary Computation Conference, page 733--739. New York, Morgan Kaufmann Publishers, (9-13 July 2002)
R. Crawford-Marks, L. Spector, and J. Klein. Late Breaking Papers at the 2004 Genetic and
Evolutionary Computation Conference, Seattle, Washington, USA, (26 July 2004)
S. Luke, and L. Spector. Genetic Programming 1998: Proceedings of the Third
Annual Conference, page 208--213. University of Wisconsin, Madison, Wisconsin, USA, Morgan Kaufmann, (22-25 July 1998)