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)
S. Gross, B. Mokbel, B. Hammer, and N. Pinkwart. volume 8474 of Lecture Notes in Computer Science, page 340--347. Springer International Publishing, (2014)
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)