R. Vatrapu, P. Reimann, S. Bull, and M. Johnson. Proceedings of the Third International Conference on Learning Analytics and Knowledge, page 125--134. New York, NY, USA, ACM, (2013)
R. Vatrapu, P. Reimann, S. Bull, and M. Johnson. Proceedings of the Third International Conference on Learning Analytics and Knowledge, page 125--134. New York, NY, USA, ACM, (2013)