B. Ganter, and S. Kuznetsov. Proceedings of the 9th International Conference on Conceptual Structures (ICCS 2001), volume 2120 of Lecture Notes in Computer Science, page 129-142. Springer, (2001)
S. Rudolph, M. Krötzsch, and P. Hitzler. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), volume 4604 of Lecture Notes in Artificial Intelligence, page 464-467. Berlin, Heidelberg, Springer-Verlag, (July 2007)
P. Gehring, and R. Wille. Proceedings of the 14th International Conference on Conceptual Structures (ICCS 2006), volume 4068 of Lecture Notes in Computer Science, page 215-228. Springer, (2006)
S. Masmoudi. Proceedings of the 9th International Conference on Conceptual Structures (ICCS 2001), volume 2120 of Lecture Notes in Computer Science, page 58-71. Springer, (2001)
P. Hasle. Proceedings of the 14th International Conference on Conceptual Structures (ICCS 2006), volume 4068 of Lecture Notes in Computer Science, page 2-21. Springer, (2006)