S. Göbel, M. Heidemann, U. Jasnoch, and G. Stumme. Hypermedia im Umweltschutz. 3. Workshop in Ulm 2000, Umwelt-Informatik aktuell, Bd. 24, page 169-179. Marburg, (2000)
P. Eklund, B. Groh, G. Stumme, and R. Wille. Conceptual Structures: Logical, Linguistic, and Computational, volume 1867 of LNAI, page 453-467. Heidelberg, Springer, (2000)
J. Tane, C. Schmitz, G. Stumme, S. Staab, and R. Studer. Mobiles Lernen und Forschen - Beiträge der Fachtagung an der Universität, page 93-104. Kassel University Press, (November 2003)
B. Ganter, and G. Stumme. Conceptual Structures for Knowledge Creation and Communication., volume 2746 of LNAI, page 131-145. Heidelberg, Springer, (2003)
G. Stumme. Conceptual Structures at Work: 12th International Conference on Conceptual Structures (ICCS 2004), volume 3127 of LNCS, page 109-125. Heidelberg, Springer, (2004)