N. Hoai, R. McKay, and H. Abbass. Genetic Programming, Proceedings of EuroGP'2003, volume 2610 of LNCS, page 335--344. Essex, Springer-Verlag, (14-16 April 2003)
N. Hoai, and R. McKay. Proceedings of the 2004 IEEE Congress on Evolutionary
Computation, page 472--477. Portland, Oregon, IEEE Press, (20-23 June 2004)
N. Hoai, R. McKay, D. Essam, and H. Hao. Proceedings of the 8th European Conference on Genetic
Programming, volume 3447 of Lecture Notes in Computer Science, page 108--119. Lausanne, Switzerland, Springer, (30 March - 1 April 2005)
N. Hoai, R. McKay, and D. Essam. Genetic Programming, Proceedings of the 5th European
Conference, EuroGP 2002, volume 2278 of LNCS, page 228--237. Kinsale, Ireland, Springer-Verlag, (3-5 April 2002)