S. Braun, A. Schmidt, A. Walter, and V. Zacharias. Good Tags and Bad Tags - Social Tagging in der Wissensorganisation, volume 47 of Medien in der Wissenschaft, Waxmann, (2008)
S. Braun, and A. Schmidt. 7th International Conference on Knowledge Management (IKNOW '07), Special Track on Integrating Working and Learning in Business (IWL), (2007)
A. Abecker, S. Braun, W. Kazakos, and V. Zacharias. Light up the Ideas of Environmental Informatics: Proceedings of the 26th International Conference on Informatics for Environmental Protection, EnviroInfo 2012, page 393--401. Shaker Verlag, Aachen, (2012)