W. Langdon, S. Barrett, and B. Buxton. Soft Computing and Industry Recent Applications, page 597--608. Springer-Verlag, (10--24 September 2001)Published 2002.
W. Langdon, and B. Buxton. Proceedings of the Genetic and Evolutionary
Computation Conference (GECCO-2001), page 66--73. San Francisco, California, USA, Morgan Kaufmann, (7-11 July 2001)