D. Jednoralski, E. Melis, S. Sosnovsky, and C. Ullrich. Advances in Web-Based Learning ICWL 2010, volume 6483 of Lecture Notes in Computer Science, page 111--120. Berlin, Heidelberg, Springer Berlin / Heidelberg, (2010)
Y. Wang, C. Ullrich, and W. Xie. Proceedings of the Third International Conference on Education Technology
and Training (ETT 2010), IEEE, (2010)in print.
C. Ullrich, R. Shen, and D. Gillet. Advances in Web-Based Learning ICWL 2010, volume 6483 of Lecture Notes in Computer Science, page 269--278. Berlin, Heidelberg, Springer Berlin / Heidelberg, (2010)
N. Li, C. Ullrich, S. Helou, and D. Gillet. Advances in Web-Based Learning ICWL 2010, volume 6483 of Lecture Notes in Computer Science, page 161--170. Berlin, Heidelberg, Springer Berlin / Heidelberg, (2010)
X. Tan, C. Ullrich, Y. Wang, and R. Shen. Advanced Learning Technologies, IEEE International Conference on, page 607--609. Los Alamitos, CA, USA, IEEE Computer Society, (2010)
K. Borau, C. Ullrich, J. Feng, and R. Shen. Advances in Web Based Learning - ICWL 2009, 8th International Conference, Aachen, Germany, August 19-21, 2009. Proceedings, volume 5686 of Lecture Notes in Computer Science, page 78-87. Springer, (2009)