E. Adar, J. Teevan, and S. Dumais. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 1197--1206. New York, NY, USA, ACM, (2008)
M. Ames, and M. Naaman. CHI '07: Proceedings of the SIGCHI conference on Human factors in computing systems, page 971--980. New York, NY, USA, ACM Press, (2007)
A. Balakrishnan, S. Fussell, and S. Kiesler. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 1227--1236. New York, NY, USA, ACM, (2008)
T. Blanc-Brude, and D. Scapin. IUI '07: Proceedings of the 12th international conference on Intelligent user interfaces, page 102--111. New York, NY, USA, ACM Press, (2007)