J. Guerra, R. Hosseini, S. Somyurek, and P. Brusilovsky. Proceedings of the 21st International Conference on Intelligent User Interfaces, page 152--163. New York, NY, USA, ACM, (2016)
R. Hosseini, I. Hsiao, J. Guerra, and P. Brusilovsky. Design for Teaching and Learning in a Networked World, volume 9307 of Lecture Notes in Computer Science, Springer International Publishing, (2015)