P. Dittrich, A. Skusa, W. Kantschik, and W. Banzhaf. Proceedings of the Genetic and Evolutionary
Computation Conference, 2, page 1002--1008. Orlando, Florida, USA, Morgan Kaufmann, (13-17 July 1999)
W. Banzhaf, and J. Miller. Frontiers of Evolutionary Computation, volume 11 of Genetic Algorithms And Evolutionary Computation
Series, chapter 11, Kluwer Academic Publishers, Boston, MA, USA, (2004)
W. Langdon, and W. Banzhaf. Late Breaking Papers at the 2004 Genetic and
Evolutionary Computation Conference, Seattle, Washington, USA, AAAI, (26 July 2004)