L. Bull, und O. Holland. Genetic Programming 1997: Proceedings of the Second
Annual Conference, Seite 347--352. Stanford University, CA, USA, Morgan Kaufmann, (13-16 July 1997)
R. Poli, W. Langdon, und O. Holland. Proceedings of the 8th European Conference on Genetic
Programming, Volume 3447 von Lecture Notes in Computer Science, Seite 291--300. Lausanne, Switzerland, Springer, (30 March - 1 April 2005)
W. Langdon, R. Poli, O. Holland, und T. Krink. Proceedings SIS 2005 IEEE Swarm Intelligence, Seite 30--37. Pasadena, California, USA, IEEE, (8-10 June 2005)