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T.  G\'f6hnert, Ziebarth, S., Malzahn, N., und H. Hoppe, U., ?Enriching (Learning) Community Platforms with Learning Analytics Components?, in Collaboration and Technology, Bd. 8658, N.  Baloian, Burstein, F., Ogata, H., Santoro, F., und Zurita, G., Hrsg. Springer International Publishing, 2014, S. 177-184.\par \par S.  Zeini, G\'f6hnert, T., Hoppe, H. U., und Krempel, L., ?The impact of measurement time on subgroup detection in online communities?, in Proceedings of the 2012 International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2012), 2012, S. 389?394.\par \par T.  G\'f6hnert, Malzahn, N., und Hoppe, H. U., ?A flexible multi-mode undo mechanism for a collaborative modeling environment?, in Groupware: Design, Implementation, and Use, Springer, 2009.\par \par }