P. Schonhofen. WI '06: Proceedings of the 2006 IEEE/WIC/ACM International Conference on Web Intelligence, Seite 456--462. Washington, DC, USA, IEEE Computer Society, (2006)
A. Das, M. Datar, A. Garg, und S. Rajaram. WWW '07: Proceedings of the 16th international conference on World Wide Web, Seite 271--280. New York, NY, USA, ACM, (2007)
P. Heymann, G. Koutrika, und H. Garcia-Molina. WSDM '08: Proceedings of the International Conference on Web Search and Web Data Mining, Seite 195--206. New York, NY, USA, ACM, (Februar 2008)