B. Sertkaya. Proceedings of the 17th International Conference on Conceptual Structures (ICCS 2009), том 5662 из Lecture Notes in Computer Science, стр. 284-292. Springer, (2009)
S. Kuznetsov, S. Obiedkov, и C. Roth. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), том 4604 из Lecture Notes in Artificial Intelligence, стр. 241-254. Berlin, Heidelberg, Springer-Verlag, (июля 2007)