D. Gruhl, R. Guha, D. Liben-Nowell, and A. Tomkins. WWW '04: Proceedings of the 13th international conference on World Wide Web, page 491--501. New York, NY, USA, ACM Press, (2004)
D. Gruhl, R. Guha, D. Liben-Nowell, and A. Tomkins. WWW '04: Proceedings of the 13th international conference on World Wide Web, page 491--501. New York, NY, USA, ACM Press, (2004)