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O. Corby, und C. Faron-Zucker. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), Volume 4604 von Lecture Notes in Artificial Intelligence, Seite 472-475. Berlin, Heidelberg, Springer-Verlag, (Juli 2007)
R. Dieng-Kuntz, und O. Corby. Proceedings of the 13th International Conference on Conceptual Structures (ICCS 2005), Volume 3596 von Lecture Notes in Computer Science, Seite 19-50. Springer, (2005)