R. Budiu, P. Pirolli, and M. Fleetwood. AVI '06: Proceedings of the working conference on Advanced visual interfaces, page 457--462. New York, NY, USA, ACM Press, (2006)
R. Farzan, and P. Brusilovsky. Adaptive Hypermedia and Adaptive Web-Based Systems: 4th International Conference, AH 2006, volume 4018 of Lecture Notes in Computer Science, page 91--100. Berlin, Springer Verlag, (2006)
P. Mulholland, T. Collins, and Z. Zdrahal. HYPERTEXT '05: Proceedings of the sixteenth ACM conference on Hypertext and hypermedia, page 23--31. New York, NY, USA, ACM Press, (2005)