M. Klein, D. Fensel, F. van Harmelen, and I. Horrocks. Proceedings of the Workshop on Applications of
Ontologies and Problem-solving Methods, 14th European
Conference on Artificial Intelligence (ECAI 2000), Berlin, Germany, (August 2000)
J. Klein, and L. Spector. GECCO '07: Proceedings of the 9th annual conference on
Genetic and evolutionary computation, 2, page 1628--1635. London, ACM Press, (7-11 July 2007)