Mineau, Guy and Stumme, Gerd and Wille, Rudolf. Conceptual Structures Represented by Conceptual Graphs and Formal Concept Analysis. Conceptual Structures: Standards and Practices. Proc. ICCS '99. editor(s) Tepfenhart, W. and Cyre, W.. LNAI, (1640) 423-441, Springer, Heidelberg, Year 1999.

Prediger, S. and Stumme, G.. Theory-Driven Logical Scaling. Proc. 6th Intl. Workshop Knowledge Representation Meets Databases (KRDB'99). editor(s) et al, E. Franconi. (CEUR Workshop Proc. 21) Year 1999.

Skorsky, M. and Stumme, G. and Wille, R. and Wille, U.. Reuse in the Development Process of TOSCANA Systems. Proc. Workshop on Knowledge Management, Organizational Memory and Reuse, 5th German Conf. on. editor(s) Puppe, F. and Fensel, D. and Kühler, J. and Studer, R. and Wetter, Th.. Würzburg, Year 1999.

Stumme, G.. Conceptual Knowledge Discovery with Frequent Concept Lattices. Year 1999.

Stumme, G.. Hierarchies of Conceptual Scales. Proc.Workshop on Knowledge Acquisition, Modeling and Management (KAW'99). editor(s) Gaines, T. B. and Kremer, R. and Musen, M.. (2) 78-95, Banff, Year 1999.

Stumme, G. and Wolff, K. E.. Numerical Aspects in the Data Model of Conceptual Information Systems. Advances in Database Technologies. Proc. Intl. Workshop on Data Warehousing and. editor(s) Kambayashi, Y. and Lee, Dik Kun and Lim, Ee-Peng and Mohania, M. K. and Masunaga, Y.. LNCS, (1552) 117-128, Springer, Heidelberg, Year 1999.

Stumme, Gerd. Acquiring Expert Knowledge for the Design of Conceptual Information Systems. Knowledge Acquisition, Modeling, and Management. Proc. 11th European. editor(s) Fensel, D. and Studer, R.. LNAI, (1621) 275-290, Springer, Heidelberg, Year 1999.

Stumme, Gerd. Dual Retrieval in Conceptual Information Systems. Datenbanksysteme in Büro, Technik und Wissenschaft. Proc. BTW'99. editor(s) Buchmann, A.. 328-342, Heidelberg, Year 1999.