W. Langdon. SEN-R9907. Centrum voor Wiskunde en Informatica, CWI, P.O. Box 94079, Kruislaan 413, NL-1090 GB
Amsterdam, The Netherlands, (11 April 1999)
W. Langdon. Proceedings of the Genetic and Evolutionary
Computation Conference, 2, Seite 1092--1097. Orlando, Florida, USA, Morgan Kaufmann, (13-17 July 1999)