H. Pfeiffer, and J. Pfeiffer. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), volume 4604 of Lecture Notes in Artificial Intelligence, page 484-487. Berlin, Heidelberg, Springer-Verlag, (July 2007)
G. Streeter, and A. Potter. Proceedings of the 12th International Conference on Conceptual Structures (ICCS 2004), volume 3127 of Lecture Notes in Computer Science, page 361-374. Springer, (2004)
T. Kaiser. Proceedings of the 13th International Conference on Conceptual Structures (ICCS 2005), volume 3596 of Lecture Notes in Computer Science, page 195-208. Springer, (2005)
N. Fuchs. Proceedings of the 13th International Conference on Conceptual Structures (ICCS 2005), volume 3596 of Lecture Notes in Computer Science, page 51-51. Springer, (2005)
Y. Yu, J. Wang, T. Wang, and H. Chen. Proceedings of the 14th International Conference on Conceptual Structures (ICCS 2006), volume 4068 of Lecture Notes in Computer Science, page 441-454. Springer, (2006)