W. Lau, K. Lee, und K. Leung. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 1, Seite 839--846. Seattle, Washington, USA, ACM Press, (8-12 July 2006)
R. Kozma, R. McGhee, E. Quellmalz, und D. Zalles. International Journal of Educational Development, v24 n4 p361-381 Jul 2004, 24 (4):
361(0701 2004)EM: 2006; RV: T.