Conceptual Structures -- Broadening the Base. Proc. 9th International Conference on Conceptual Structures. editor(s) Delugach, H. and Stumme, G.. LNAI, (2120) Springer, Heidelberg, Year 2001.

Hereth, J. and Stumme, G.. Reverse Pivoting in Conceptual Information Systems.. Conceptual Structures: Broadening the Base. . editor(s) Delugach, H. and Stumme, G.. LNAI, (2120) 202-215, Springer, Heidelberg, Year 2001.

Stumme, G. and Taouil, R. and Bastide, Y. and Lakhal, L.. Conceptual Clustering with Iceberg Concept Lattices. Proc. GI-Fachgruppentreffen Maschinelles Lernen (FGML'01). editor(s) Klinkenberg, R. and Rüping, S. and Fick, A. and Henze, N. and Herzog, C. and Molitor, R. and Schröder, O.. Universität Dortmund 763, Year 2001.