M. Steyvers, R. Shiffrin, and D. Nelson. Experimental Cognitive Psychology and its Applications: Festschrift in Honour of L Bourne, W Kintsch and T Landauer, (2004)
J. Tang, H. fung Leung, Q. Luo, D. Chen, and J. Gong. IJCAI'09: Proceedings of the 21st international jont conference on Artifical intelligence, page 2089--2094. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (2009)
K. Schoefegger, P. Seitlinger, and T. Ley. Proceedings of the 1st Workshop on Recommender Systems for Technology Enhanced Learning (RecSysTEL 2010), 1, page 2829 - 2838. (Sep 7, 2010)
R. Jäschke, F. Eisterlehner, A. Hotho, and G. Stumme. RecSys '09: Proceedings of the 2009 ACM Conference on Recommender Systems, New York, NY, USA, ACM, (2009)(to appear).
K. Schoefegger, P. Seitlinger, and T. Ley. It’s about time: Exploring temporality in group learning. Alpine Rendez-Vous, Garmisch-Partenkirchen, December 2009, (2009)
M. Noll, C. man Au Yeung, N. Gibbins, C. Meinel, and N. Shadbolt. SIGIR '09: Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval, page 612--619. New York, NY, USA, ACM, (2009)