Marlo Souza,  Renata Vieira,  Débora Busetti,  Rove Chishman,  Isa Mara Alves. 

Opinion Lexicons are linguistic resources annotated with semantic orientation of terms (positive and negative) and are important for opinion mining tasks. In the literature we see a variety of proposals for the construction of opinion lexicons using different linguistic resources and techniques. In thiswork, we propose and evaluate the integration of such linguistic resources to create a single lexicon for the Portuguese language.

http://www.lbd.dcc.ufmg.br/colecoes/stil/2011/007.pdf

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