M. Ebner, and A. Zell. Proceedings of the Genetic and Evolutionary
Computation Conference, 2, page 1009--1014. Orlando, Florida, USA, Morgan Kaufmann, (13-17 July 1999)
M. Ebner. Advances in Artificial Life. 7th European Conference
on Artificial Life, volume 2801 of Lecture Notes in Artificial Intelligence, page 228--237. Dortmund, Germany, Springer, (14-17 September 2003)