L. Spector, R. Moore, und A. Robinson. 2001 Genetic and Evolutionary Computation Conference
Late Breaking Papers, Seite 384--389. San Francisco, California, USA, (9-11 July 2001)
G. Lee. Proceedings of the 2001 Congress on Evolutionary
Computation CEC2001, Seite 403--409. COEX, World Trade Center, 159 Samseong-dong,
Gangnam-gu, Seoul, Korea, IEEE Press, (27-30 May 2001)