C. Oliver-Morales, and K. Rodr\'ıguez
Vázquez. GECCO 2002: Proceedings of the Genetic and
Evolutionary Computation Conference, page 892. New York, Morgan Kaufmann Publishers, (9-13 July 2002)
G. Hornby, and J. Pollack. Proceedings of the Genetic and Evolutionary
Computation Conference (GECCO-2001), page 868--875. San Francisco, California, USA, Morgan Kaufmann, (7-11 July 2001)
G. Hornby, and J. Pollack. Proceedings of the 2001 Congress on Evolutionary
Computation CEC2001, page 600--607. COEX, World Trade Center, 159 Samseong-dong,
Gangnam-gu, Seoul, Korea, IEEE Press, (27-30 May 2001)