C. Schmitz, S. Staab, R. Studer, G. Stumme, and J. Tane. Proc. E-Learn 2002: World Conference on E-Learning in Corporate, Government, Healthcare, & Higher Education, Montreal, (October 2002)
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)
C. Schmitz, S. Staab, R. Studer, G. Stumme, and J. Tane. Proc. E-Learn 2002: World Conference on E-Learning in Corporate, Government, Healthcare, & Higher Education, Montreal, (October 2002)