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. Zinn, J. Moore, и M. Core. ITS '02: Proceedings of the 6th International Conference on Intelligent Tutoring Systems, стр. 574--584. London, UK, Springer-Verlag, (2002)