S. Christensen, and F. Oppacher. GECCO '07: Proceedings of the 9th annual conference on
Genetic and evolutionary computation, 2, page 1574--1579. London, ACM Press, (7-11 July 2007)
L. Trujillo, and G. Olague. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 1, page 887--894. Seattle, Washington, USA, ACM Press, (8-12 July 2006)
J. Koza, S. Al-Sakran, and L. Jones. Genetic Programming Theory and Practice IV, volume 5 of Genetic and Evolutionary Computation, chapter 4, Springer, Ann Arbor, (11-13 May 2006)
A. Lemieux, C. Gagné, and M. Parizeau. Eighth International Workshop on Frontiers in
Handwriting Recognition 2002 (IWFHR 2002), page 145--150. Niagara-on-the-Lake, Ontario, Canada, (August 2002)