S. Dignum, and R. Poli. Proceedings of the 11th European Conference on Genetic
Programming, volume 4971 of LNCS, page 158--169. Naples, Springer, (26-28 March 2008)
S. Dignum, and R. Poli. Proceedings of the 11th European Conference on Genetic
Programming, volume 4971 of LNCS, page 110--121. Naples, Springer, (26-28 March 2008)