R. Popp, D. Montana, R. Gassner, G. Vidaver, and S. Iyer. IEEE International Conference on Systems, Man, and
Cybernetics, 3, page 2184--2189. San Diego, CA USA, IEEE, (11-14 October 1998)
L. Jones, S. Al-Sakran, and J. Koza. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 1, page 823--830. Seattle, Washington, USA, ACM Press, (8-12 July 2006)