J. Farkas, and J. Sarbo. Proceedings of the 10th International Conference on Conceptual Structures (ICCS 2002), volume 2393 of Lecture Notes in Computer Science, page 177-190. Springer, (2002)
J. Sarbo, and J. Farkas. Proceedings of the 10th International Conference on Conceptual Structures (ICCS 2002), volume 2393 of Lecture Notes in Computer Science, page 20-33. Springer, (2002)