D. Ramage, P. Heymann, C. Manning, и H. Molina. Proceedings of the Second ACM International Conference on Web Search and Data Mining, стр. 54--63. New York, NY, USA, ACM, (2009)
D. Ramage, P. Heymann, C. Manning, и H. Molina. WSDM '09: Proceedings of the Second ACM International Conference on Web Search and Data Mining, стр. 54--63. New York, NY, USA, ACM, (2009)