Stumme, G.. "Off to New Shores -- Conceptual Knowledge Discovery and Processing." Intl. J. Human-Comuter Studies (IJHCS) 59 , no. 3 (2003): 287-325.

Becker, K., Stumme, G., Wille, R., Wille, U. and Zickwolff, M.. "Conceptual Information Systems Discussed Through an IT-Security Tool." Paper presented at the meeting of the Knowledge Engineering and Knowledge Management. Methods, Models, and Tools., Heidelberg, 2000.

Hereth, J., Stumme, G., Wille, R. and Wille, U.. "Conceptual Knowledge Discovery and Data Analysis." Paper presented at the meeting of the Conceptual Structures: Logical, Linguistic, and Computational Issues. Proc. ICCS '00, Heidelberg, 2000.

Begriffliche Wissensverarbeitung -- Methoden und Anwendungen. Stumme, Gerd and Wille, Rudolf, eds. , Springer , Heidelberg (2000). .

Wille, Rudolf. "Begriffliche Wissensverarbeitung: Theorie und Praxis." Informatik--Spektrum 23 , no. 6 (2000): 357-369.

Stumme, Gerd. "On-Line Analytical Processing with Conceptual Information Systems." Paper presented at the meeting of the Proc. 5th Intl. Conf. on Foundations of Data Organization (FODO'98), 1998.

Stumme, Gerd. "Concept Exploration - A Tool for Creating and Exploring Conceptual Hierarchies." Paper presented at the meeting of the Conceptual Structures: Fulfilling Peirce's Dream. Proc. ICCS'97, Berlin, 1997.

Wille, Rudolf. "Plädoyer für eine philosophische Grundlegung der Begrifflichen Wissensverarbeitung." Paper presented at the meeting of the Begriffliche Wissensverarbeitung -- Grundfragen und Aufgaben, Mannheim, 1994.

Wille, Rudolf. "Pl�doyer f�r eine philosophische Grundlegung der Begrifflichen Wissensverarbeitung." Paper presented at the meeting of the Begriffliche Wissensverarbeitung -- Grundfragen und Aufgaben, Mannheim, 1994.