M. Kamvar, M. Kellar, R. Patel, and Y. Xu. Proceedings of the 18th international conference on World wide web, page 801--810. New York, NY, USA, ACM, (2009)
K. Church, and N. Oliver. Proceedings of the 13th International Conference on Human Computer Interaction with Mobile Devices and Services, page 67--76. New York, NY, USA, ACM, (2011)
K. Church, B. Smyth, K. Bradley, and P. Cotter. Proceedings of the 10th international conference on Human computer interaction with mobile devices and services, page 13--22. New York, NY, USA, ACM, (2008)
L. Granka, T. Joachims, and G. Gay. Proceedings of the 27th annual international ACM SIGIR conference on Research and development in information retrieval, page 478--479. New York, NY, USA, ACM, (2004)
D. Downey, S. Dumais, D. Liebling, and E. Horvitz. Proceeding of the 17th ACM conference on Information and knowledge management, page 449--458. New York, NY, USA, ACM, (2008)