D. Liben-Nowell, and J. Kleinberg. Proceedings of the twelfth international conference on Information and knowledge management, page 556--559. New York, NY, USA, ACM, (2003)
D. Liben-Nowell, and J. Kleinberg. Proceedings of the 12th International Conference on Information and Knowledge Management (CIKM 2003), page 556--559. New Orleans, LA, USA, ACM, (2003)