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)
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, (2005)
N. Kaplan, and Y. Chisik. JCDL '05: Proceedings of the 5th ACM/IEEE-CS joint conference on Digital libraries, page 235--243. New York, NY, USA, ACM Press, (2005)