Ganter, Bernhard and Stumme, Gerd. "Creation and Merging of Ontology Top-Levels." Paper presented at the meeting of the Conceptual Structures for Knowledge Creation and Communication., Heidelberg, 2003.

Tane, Julien, Schmitz, Christoph, Stumme, Gerd, Staab, Steffen and Studer, R.. "The Courseware Watchdog: an Ontology-based tool for finding and organizing
learning material." Paper presented at the meeting of the Mobiles Lernen und Forschen - Beiträge der Fachtagung an der Universität, 2003.