R. Walker. Proceedings of the 2001 Congress on Evolutionary
Computation CEC2001, page 831--938. COEX, World Trade Center, 159 Samseong-dong,
Gangnam-gu, Seoul, Korea, IEEE Press, (27-30 May 2001)
T. Yu, and J. Rutherford. The Seventh ACM SIGKDD International Conference on
Knowledge Discovery and Data Mining, San Francisco, California, USA, (26-29 August 2001)