K. Umapathy, and A. Ritzhaupt. Proceedings of the 49th SIGMIS Annual Conference on Computer Personnel Research, page 49--57. New York, NY, USA, ACM, (2011)
H. Daniels, W. Sugar, A. Brown, T. Green, F. Martin, A. Ritzhaupf, and M. Bishop. Proceedings of Society for Information Technology & Teacher Education International Conference, 2011, page 1097-1099. Association for the Advancement of Computing in Education, (2011)
A. Kartal, S. Doerfel, A. Roßnagel, and G. Stumme. Informatik 2011 - Informatik schafft Communities - Proceedings der 41. GI-Jahrestagung, volume 192 of Lecture Notes in Informatics, page 412. Gesellschaft für Informatik e.V. (GI), Bonner Köllen Verlag, (October 2011)
B. Bullock, H. Lerch, A. Roßnagel, A. Hotho, and G. Stumme. Proceedings of the 11th International Conference on Knowledge Management and Knowledge Technologies, page 15:1--15:8. New York, NY, USA, ACM, (2011)
J. Freyne, S. Anand, I. Guy, and A. Hotho. Proceedings of the fifth ACM conference on Recommender systems, page 383--384. New York, NY, USA, ACM, (2011)
J. Illig, A. Hotho, R. Jäschke, and G. Stumme. Knowledge Processing and Data Analysis, volume 6581 of Lecture Notes in Computer Science, page 136--149. Berlin/Heidelberg, Springer, (2011)