(2000). Working with Conceptual Structures -- Contributions to ICCS 2000. Suppl. Proc. 8th International
Conference on Conceptual Structures (ICCS 2000) . In G. Stumme (ed.), Shaker

(2005). Contributions to ICCS 2005 . In F. Dau, M.-L. Mugnier & G. Stumme (ed.), Contributions to ICCS 2005. kassel university press

(2005). Conceptual Structures: Common Semantics for Sharing Knowledge, 13th International Conference on Conceptual Structures, ICCS 2005, Kassel, Germany, July 17-22, 2005, Proceedings . In F. Dau, M.-L. Mugnier & G. Stumme (ed.), ICCS. Springer