A. Hotho, R. Jäschke, C. Schmitz, и G. Stumme. Proceedings of the First Conceptual Structures Tool Interoperability Workshop at the 14th International Conference on Conceptual Structures, стр. 87-102. Aalborg, Aalborg Universitetsforlag, (2006)
C. Cattuto, D. Benz, A. Hotho, и G. Stumme. The Semantic Web -- ISWC 2008, том 5318 из Lecture Notes in Computer Science, стр. 615--631. Berlin/Heidelberg, Springer, (2008)