N. Modalavalasa, G. Rao, and K. Prasad. International Journal of Computer Science, Engineering and Information Technology (IJCSEIT), 2 (2):
67-78(April 2012)
G. Barlow, and C. Oh. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 1, page 135--142. Seattle, Washington, USA, ACM Press, (8-12 July 2006)