(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

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

(2001). Conceptual Structures -- Broadening the Base. Proc. 9th International Conference on Conceptual Structures . In H. Delugach & G. Stumme (ed.), Springer

Eklund, P., Groh, B., Stumme, G. & Wille, R. (2000). Contextual-Logic Extension of TOSCANA.. In B. Ganter & G. W. Mineau (eds.), Conceptual Structures: Logical, Linguistic, and Computational (p./pp. 453-467), Heidelberg: Springer.

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

Mineau, G., Stumme, G. & Wille, R. (1999). Conceptual Structures Represented by Conceptual Graphs and Formal Concept Analysis. In W. Tepfenhart & W. Cyre (eds.), Conceptual Structures: Standards and Practices. Proc. ICCS '99 (p./pp. 423-441), Heidelberg: Springer.