M. Marschollek, K. Wolf, O. Bott, M. Geisler, M. Plischke, W. Ludwig, A. Hornberger, and R. Haux. Proceedings of the 12th World Congress on Health (Medical) Informatics
-- Building Sustainable Health Systems. MEDINFO2007, 20.-24.08.2007,
Brisbane, Australia, volume 129 of Stud Health Technol Inform, page 8--12. Amsterdam, IOS Press, (August 2007)
S. Spiekermann, J. Korunovska, and C. Bauer. International Conference on Information Systems (ICIS 2012), Association for Information Systems, (December 2012)
S. Hachmeier, R. Jäschke, and H. Saadatdoorabi. Proceedings of the Conference on ``Lernen, Wissen, Daten, Analysen'', 3341, page 213--226. Aachen, (2022)