A. Hotho, R. Jäschke, C. Schmitz, and G. Stumme. Proceedings of the First Conceptual Structures Tool Interoperability Workshop at the 14th International Conference on Conceptual Structures, page 87-102. Aalborg, Aalborg Universitetsforlag, (2006)
C. Lange, M. Kerber, and C. Rowat. (2013)Tutorial at INFORMATIK 2013, Computer science adapted to humans, organization and the environment, 43rd annual meeting of the German Informatics Society (Gesellschaft für Informatik e.V. (GI)).