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)
F. Amarger, O. Haemmerlé, N. Hernandez, und C. Pradel. Proceedings of the 21th International Conference on Conceptual Structures (ICCS 2013), Volume 7735 von Lecture Notes in Computer Science, Seite 75-89. Springer, (2013)