L. Backstrom, C. Dwork, and J. Kleinberg. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 181--190. New York, NY, USA, ACM Press, (2007)
L. Backstrom, C. Dwork, and J. Kleinberg. Proceedings of the 16th international conference on World Wide Web, page 181--190. New York, NY, USA, ACM, (2007)