P. Heymann, D. Ramage, и H. Garcia-Molina. SIGIR '08: Proceedings of the 31st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, стр. 531--538. New York, NY, USA, ACM, (2008)
B. Fonseca, P. Golgher, E. de Moura, и N. Ziviani. LA-WEB '03: Proceedings of the First Latin American Web Congress, Washington, DC, USA, IEEE Computer Society, (2003)
R. Agrawal, T. Imielinski, и A. Swami. SIGMOD '93: Proceedings of the 1993 ACM SIGMOD international conference on Management of data, стр. 207--216. New York, NY, USA, ACM Press, (1993)