D. Knoell, M. Atzmueller, C. Rieder, и K. Scherer. Proc. GWEM 2017, co-located with 9th Conference Professional Knowledge Management (WM 2017), Karlsruhe, Germany, KIT, (2017)
J. Ziegler, M. Graube, A. Suhrbier, N. Wessel, H. Malberg, и L. Urbas. Proceedings of the 13th International Conference on Human Computer Interaction with Mobile Devices and Services, стр. 191--200. New York, NY, USA, ACM, (2011)