J. Zhang, M. Ackerman, and L. Adamic. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 221--230. New York, NY, USA, ACM, (2007)
J. Zhang, M. Ackerman, and L. Adamic. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 221--230. New York, NY, USA, ACM Press, (2007)
J. Zhang, M. Ackerman, and L. Adamic. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 221--230. New York, NY, USA, ACM Press, (2007)
J. Zhang, M. Ackerman, and L. Adamic. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 221--230. New York, NY, USA, ACM Press, (2007)