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Proceedings of the Thirtieth international conference on Very large data bases - Volume 30, page 576--587. VLDB Endowment, (2004)
Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval, page 423--430. New York, NY, USA, ACM, (2007)
Oxford University Press, Oxford, (Jan 16, 2003)
Proceedings of the International Conference on Weblogs and Social Media (ICWSM 2007), (March 2007)Nominated for Best Paper Award.
WWW '07: Proceedings of the 16th international conference on World Wide Web, page 835--844. New York, NY, USA, ACM, (2007)
AI Communications Special Issue on "Network Analysis in Natural Sciences and Engineering" (to appear) (2007)