D. Liben-Nowell, and J. Kleinberg. CIKM '03: Proceedings of the twelfth international conference on Information and knowledge management, page 556--559. New York, NY, USA, ACM, (2003)
D. Cai, Z. Shao, X. He, X. Yan, and J. Han. LinkKDD '05: Proceedings of the 3rd international workshop on Link discovery, page 58--65. New York, NY, USA, ACM, (2005)
J. Leskovec, K. Lang, A. Dasgupta, and M. Mahoney. WWW '08: Proceeding of the 17th international conference on World Wide Web, page 695--704. New York, NY, USA, ACM, (2008)