O. Boydell, and B. Smyth. IUI '07: Proceedings of the 12th international conference on Intelligent user interfaces, page 42--51. New York, NY, USA, ACM Press, (2007)
A. Das, M. Datar, A. Garg, and S. Rajaram. Proceedings of the 16th International Conference on World Wide Web, page 271--280. New York, NY, USA, ACM, (2007)
A. Repenning, and A. Ioannidou. AVI '06: Proceedings of the working conference on Advanced visual interfaces, page 127--134. New York, NY, USA, ACM, (2006)
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)
F. Liu, C. Yu, and W. Meng. CIKM '02: Proceedings of the eleventh international conference on Information and knowledge management, page 558--565. New York, NY, USA, ACM Press, (2002)