R. Wille. Proceedings of the 10th International Conference on Conceptual Structures (ICCS 2002), Volume 2393 von Lecture Notes in Computer Science, Seite 382-396. Springer, (2002)
S. Ferré, und O. Ridoux. Proceedings of the 10th International Conference on Conceptual Structures (ICCS 2002), Volume 2393 von Lecture Notes in Computer Science, Seite 299-313. Springer, (2002)