D. Power, C. Ryan, and R. Azad. Proceedings of the 2005 IEEE Congress on Evolutionary
Computation, 2, page 1831--1838. Edinburgh, Scotland, UK, IEEE Press, (2-5 September 2005)
P. Nordin, F. Hoffmann, F. Francone, M. Brameier, and W. Banzhaf. Proceedings of the Congress on Evolutionary
Computation, 2, page 1059--1066. Mayflower Hotel, Washington D.C., USA, IEEE Press, (6-9 July 1999)
P. Walsh. Proceedings of the Congress on Evolutionary
Computation, 2, page 1027--1034. Mayflower Hotel, Washington D.C., USA, IEEE Press, (6-9 July 1999)
D. Gonzalez, and F. de Vega. GECCO '07: Proceedings of the 9th annual conference on
Genetic and evolutionary computation, 2, page 1752--1752. London, ACM Press, (7-11 July 2007)
F. Fernandez, M. Tomassini, and L. Vanneschi. Genetic Programming, Proceedings of EuroGP'2001, volume 2038 of LNCS, page 51--63. Lake Como, Italy, Springer-Verlag, (18-20 April 2001)