E. Ong, O. Grebner, and U. Riss. 4th Conference on Professional Knowledge Management - Experiences and Visions -, March 28. - 30. 2007, Potsdam, Germany, GITO Verlag Berlin, (March 2007)
E. Ong, O. Grebner, and U. Riss. 4th Conference on Professional Knowledge Management - Experiences and Visions -, March 28. - 30. 2007, Potsdam, Germany, GITO Verlag Berlin, (March 2007)
R. Jäschke, A. Hotho, C. Schmitz, and G. Stumme. Proceedings of the 15th International Conference on Conceptual Structures, Sheffield, England, (July 2007)