M. Ribière, und R. Dieng-Kuntz. Proceedings of the 10th International Conference on Conceptual Structures (ICCS 2002), Volume 2393 von Lecture Notes in Computer Science, Seite 220-234. Springer, (2002)
J. Farkas, und J. Sarbo. Proceedings of the 10th International Conference on Conceptual Structures (ICCS 2002), Volume 2393 von Lecture Notes in Computer Science, Seite 177-190. Springer, (2002)