R. Baeza-Yates, and A. Tiberi. KDD '07: Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining, page 76--85. New York, NY, USA, ACM, (2007)
M. Chen, X. Liu, and J. Qin. DCMI '08: Proceedings of the 2008 International Conference on Dublin Core and Metadata Applications, page 117--127. Dublin Core Metadata Initiative, (2008)
Y. Chan, and D. Roth. Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies - Volume 1, page 551--560. Stroudsburg, PA, USA, Association for Computational Linguistics, (2011)
R. Baeza-Yates, and A. Tiberi. KDD '07: Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining, page 76--85. New York, NY, USA, ACM, (2007)