C. Chen, M. Chen, and Y. Sun. Proceedings of the seventh ACM SIGKDD international conference on Knowledge discovery and data mining, page 257--262. New York, NY, USA, ACM, (2001)
A. Brush, D. Bargeron, A. Gupta, and J. Cadiz. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, page 285--292. New York, NY, USA, ACM, (2001)
A. Kittur, E. Chi, and B. Suh. Proceedings of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 453--456. New York, NY, USA, ACM, (2008)
O. Za"iane, M. Xin, and J. Han. ADL '98: Proceedings of the Advances in Digital Libraries Conference, page 19+. Washington, DC, USA, IEEE Computer Society, (1998)
P. Ferragina, and A. Gulli. WWW '05: Special interest tracks and posters of the 14th international conference on World Wide Web, page 801--810. New York, NY, USA, ACM Press, (2005)
C. Wang, and G. Chen. ITiCSE '04: Proceedings of the 9th annual SIGCSE conference on Innovation and technology in computer science education, 36, page 132--136. New York, NY, USA, ACM Press, (September 2004)
A. Brush, D. Bargeron, A. Gupta, and J. Cadiz. CHI '01: Proceedings of the SIGCHI conference on Human factors in computing systems, page 285--292. New York, NY, USA, ACM Press, (2001)
P. Brusilovsky, R. Farzan, and J. Ahn. JCDL '05: Proceedings of the 5th ACM/IEEE-CS joint conference on Digital libraries, page 9--18. New York, NY, USA, ACM Press, (2005)
A. Patil, S. Oundhakar, A. Sheth, and K. Verma. WWW '04: Proceedings of the 13th international conference on World Wide Web, page 553--562. New York, NY, USA, ACM Press, (2004)
J. Kahan, and M. Koivunen. WWW '01: Proceedings of the 10th international conference on World Wide Web, page 623--632. New York, NY, USA, ACM Press, (2001)