P. Brusilovsky, H. Hsiao, and M. Yudelson. JCDL '08: Proceedings of the 8th ACM/IEEE-CS joint conference on Digital libraries, page 337--340. New York, NY, USA, ACM, (2008)
P. Brusilovsky, J. Ahn, T. Dumitriu, and M. Yudelson. Proceedings of the conference on Information Visualization, page 142--150. Washington, DC, USA, IEEE Computer Society, (2006)
A. Shareghi Najar, and A. Mitrovic. Artificial Intelligence in Education, volume 7926 of Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2013)
S. Gross, B. Mokbel, B. Hammer, and N. Pinkwart. volume 8474 of Lecture Notes in Computer Science, page 340--347. Springer International Publishing, (2014)
S. Ritter, P. Brusilovsky, and O. Medvedeva. Intelligent Tutoring Systems, volume 1452 of Lecture Notes in Computer Science, chapter 61, Springer Berlin Heidelberg, Berlin, Heidelberg, (Sep 28, 1998)
R. Sharrock, E. Hamonic, M. Hiron, and S. Carlier. Proceedings of the Fourth (2017) ACM Conference on Learning @ Scale, page 147--148. New York, NY, USA, ACM, (2017)