N. Guarino. Proceedings of the 14th International Conference on Conceptual Structures (ICCS 2006), Volume 4068 von Lecture Notes in Computer Science, Seite 1. Springer, (2006)
M. Keeler, und H. Pfeiffer. Proceedings of the 14th International Conference on Conceptual Structures (ICCS 2006), Volume 4068 von Lecture Notes in Computer Science, Seite 314-330. Springer, (2006)