@InProceedings{balagefilho-pardo:2013:SemEval-2013,
  author    = {Balage Filho, Pedro  and  Pardo, Thiago},
  title     = {NILC\_USP: A Hybrid System for Sentiment Analysis in Twitter Messages},
  booktitle = {Second Joint Conference on Lexical and Computational Semantics (*SEM), Volume 2: Proceedings of the Seventh International Workshop on Semantic Evaluation (SemEval 2013)},
  month     = {June},
  year      = {2013},
  address   = {Atlanta, Georgia, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {568--572},
  url       = {http://www.aclweb.org/anthology/S13-2095}
}