X. Liu, S. Zhang, F. Wei, und M. Zhou. Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies - Volume 1, Seite 359--367. Stroudsburg, PA, USA, Association for Computational Linguistics, (2011)
M. Michelson, und S. Macskassy. Proceedings of the fourth workshop on Analytics for noisy unstructured text data, Seite 73--80. New York, NY, USA, ACM, (2010)