S. Ferré, и O. Ridoux. Proceedings of the 9th International Conference on Conceptual Structures (ICCS 2001), том 2120 из Lecture Notes in Computer Science, стр. 187-201. Springer, (2001)
H. Mori. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), том 4604 из Lecture Notes in Artificial Intelligence, стр. 505-508. Berlin, Heidelberg, Springer-Verlag, (июля 2007)