J. Metzger, F. Ber, und A. Napoli. Proceedings of the 11th International Conference on Conceptual Structures (ICCS 2003), Volume 2746 von Lecture Notes in Computer Science, Seite 215-228. Springer, (2003)
B. Motik. Proceedings of the 18th International Conference on Conceptual Structures (ICCS 2010), Volume 6208 von Lecture Notes in Computer Science, Seite 10-12. Springer, (2010)