J. Angele, and M. Gesmann. Proceedings of the Second International Conference on Rules and Rule Markup Languages for the Semantic Web, Athens, GA, USA, page 58-66. (2006)
S. Middleton, D. Roure, and N. Shadbolt. K-CAP '01: Proceedings of the 1st international conference on Knowledge capture, page 100--107. New York, NY, USA, ACM, (2001)