L. Zhang, B. Liu, S. H. Lim, S. H. and E. O’Brien-Strain, “Extracting and Ranking Product Features in Opinion Documents,” Proceedings of the 23rd International Conference on Computational Linguistics (COLING), Beijing, 23-27 August 2010, pp. 1462-1470.
 V. Hatzivassiloglou and K. McKeown, “Predicting the Semantic Orientation of Adjectives,” Proceedings of the 35th Annual Meeting of the Association for Computational Lingusitics, Madrid, 7-10 July 1997, pp. 174-181. doi:10.3115/976909.979640
 B. Liu, M. Hu and J. Cheng, “Opinion Observer: Analyzing and Comparing Opinions on the Web. Proceedings of International World Wide Web Conference (WWW’05), New York, 2005, pp. 342-351. doi:10.1145/1060745.1060797
 J. Wiebe and E. Riloff, “Creating Subjective and Objective sentence classifiers from unannotated texts,” Proceedings of International Conference on Intelligent Text Processing and Computational Linguistics (CICLing’05), Mexico City, 13-19 February 2005, pp. 486-497. doi:10.1007/978-3-540-30586-6_53
 G. Carenini, R. T. Ng and E. Zwart, “Extracting Knowledge from Evaluative Text,” Proceedings of the Third International Conference on Knowledge Capture, Banff, 2-5 October 2005, pp. 11-18. doi:10.1145/1088622.1088626
 M. Popescu and O. Etzioni, “Extracting Product Features and Opinions from Reviews,” Proceedings of the Conference on Empirical Methods in Natural Language Processing EMNLP ‘05, Vancouver, 6-8 October 2005, pp. 339-346. doi:10.3115/1220575.1220618
 G. Ganapathibhotla and B. Liu, “Identifying Preferred Entities in Comparative Sentences,” Proceedings of the 22nd International Conference on Computational Linguistics (COLING’08), Manchester, 2008.
 S. Morinaga, K. Yamanishi, K. Tateishi and T. Fukushima, “Mining Product Reputations on the Web,” Proceedings of the 8th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, Edmonton, 23-26 July 2002.
 P. D. Turney, “Thumbs up or Thumbs down? Semantic Orientation Applied to Unsupervised Classification of Reviews,” Proceedings of the Conference of the Association of Computational Lingustics, Howard, 24 August-1 September 2002, pp. 417-424.
 J. Wiebe, R. Bruce and T. O’Hara, “Development and Use of a Gold Standard Data Set for Subjectivity Classifications,” Proceedings of the Conference of the Association of Computational Lingustics, College Park, 20-26 June 1999.