M. Pelikan, D. Goldberg, and E. Cantu-Paz. Proceedings of the Genetic and Evolutionary
Computation Conference, 1, page 525--532. Orlando, Florida, USA, Morgan Kaufmann, (13-17 July 1999)
J. Berger, M. Sassi, and M. Salois. Proceedings of the Genetic and Evolutionary
Computation Conference, 1, page 44--51. Orlando, Florida, USA, Morgan Kaufmann, (13-17 July 1999)
M. Oates, D. Corne, and R. Loader. Proceedings of the Genetic and Evolutionary
Computation Conference, 1, page 480--487. Orlando, Florida, USA, Morgan Kaufmann, (13-17 July 1999)
V. Sklenár, M. Radvanský, and M. Dobes. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), volume 4604 of Lecture Notes in Artificial Intelligence, page 501-504. Berlin, Heidelberg, Springer-Verlag, (July 2007)