W. Shum, K. Leung, and M. Wong. Intelligent Data Engineering and Automated Learning -
IDEAL 2005, 6th International Conference, Proceedings, volume 3578 of Lecture Notes in Computer Science, page 546--554. Brisbane, Australia, Springer, (July 2005)
S. Card, and C. Mohan. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 2, page 1587--1588. Seattle, Washington, USA, ACM Press, (8-12 July 2006)