K. Wolff. Proceedings of the 12th International Conference on Conceptual Structures (ICCS 2004), Volume 3127 von Lecture Notes in Computer Science, Seite 126-141. Springer, (2004)
P. Hitzler, und G. Zhang. Proceedings of the 12th International Conference on Conceptual Structures (ICCS 2004), Volume 3127 von Lecture Notes in Computer Science, Seite 170-185. Springer, (2004)
M. Shaikh, P. Helmut, und M. Ishizuka. Proceedings of the 11th International Conference on Intelligent User
Interfaces (IUI-2006), Seite 303--305. Sydney, Australia, (2006)