, Many people have in some extent contributed to this article

A. Esuli and F. Sebastiani, Enhancing opinion extraction by automatically annotated lexical resources, Proceedings of the 4th conference on Human language technology: challenges for computer science and linguistics, LTC'09, pp.500-511, 2011.
DOI : 10.1007/978-3-642-20095-3_46
URL : http://nmis.isti.cnr.it/sebastiani/Publications/LTC09.pdf

H. Ghorbel and D. Jacot, Sentiment analysis of french movie reviews, Advances in Distributed Agent-Based Retrieval Tools, vol.361, pp.97-108, 2011.

C. Grouin, M. Hurault-plantet, P. Paroubek, and J. Berthelin, Deft'07 : une campagne d'´ evaluation en fouille d'opinion, Revue des Nouvelles Technologies de l'Information (RNTI). Fouille de données d'opinion., volume RNTI E-17, pp.1-24, 2009.

M. Hu and B. Liu, Mining and summarizing customer reviews, Proceedings of the tenth ACM SIGKDD international conference on Knowledge discovery and data mining, KDD '04, pp.168-177, 2004.
DOI : 10.1145/1014052.1014073
URL : http://www.cs.uic.edu/~liub/publications/kdd04-revSummary.pdf

R. Malouf and T. Mullen, Taking sides: User classification for informal online political discourse, Internet Research, vol.18, pp.177-190, 2008.
DOI : 10.1108/10662240810862239

O. Brendan, R. Connor, B. Balasubramanyan, N. Routledge, and . Smith, From tweets to polls: Linking text sentiment to public opinion time series, International AAAI Conference on Weblogs and Social Media, 2010.

I. Ounis, C. Maarten-de-rijke, G. Macdonald, I. Mishne, and . Soboroff, Overview of the trec-2006 blog track, Proceedings of the 15th Text Retrieval Conference (TREC). NIST, 2009.

B. Pang and L. Lee, A sentimental education: sentiment analysis using subjectivity summarization based on minimum cuts, Proceedings of the 42nd Annual Meeting on Association for Computational Linguistics, ACL '04, 2004.

B. Pang and L. Lee, Opinion mining and sentiment analysis, Found. Trends Inf. Retr, vol.2, issue.1-2, pp.1-135, 2008.

D. Spina, E. Meij, A. Oghina, M. T. Bui, M. Breuss et al., A corpus for entity profiling in microblog posts, LREC workshop on language engineering for online reputation management, 2012.

V. Stoyanov and C. Cardie, Annotating topics of opinions, Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08), pp.3213-3217, 2008.

H. Wang, D. Can, A. Kazemzadeh, F. Bar, and S. Narayanan, A system for realtime twitter sentiment analysis of 2012 u.s. presidential election cycle, Proceedings of the ACL 2012 System Demonstrations, ACL '12, pp.115-120, 2012.