L. Francisco-Revilla, and J. Crow. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (July 2009)
V. Stein, R. Neßelrath, J. Alexandersson, and J. Tröger. Proceedings of the 3nd International Conference on Computer Supported Education (CSEDU-11), page 462-467. Noordwijkerhout, Netherlands, (2011)
S. Harper, C. Goble, and S. Pettitt. Proceedings of the 10th International Conference on Human-Computer Interaction, 4, page 399--403. London, UK, Lawrence Erlbaum Associates, (2003)
M. Banâtre, P. Couderc, J. Pauty, and M. Becus. Mobile Human-Computer Interaction – MobileHCI 2004, volume 3160 of Lecture Notes in Computer Science, Springer, Berlin / Heidelberg, (2004)
E. Nojavani, A. Rezaeezade, and Monadjemi. International Journal on Soft Computing, Artificial Intelligence and Applications (IJSCAI), 4 (1):
23 - 37(February 2015)