@InProceedings{Delta_TFIDF_An_Improved_Feature_Space_for_Sentiment_Analysis,
  author = "Justin  Martineau and Tim  Finin",
  title = "{Delta TFIDF: An Improved Feature Space for Sentiment Analysis}",
  month = "May",
  year = "2009",
  address = "San Jose, CA",
  note = "(poster paper)",
  booktitle = "Proceedings of the Third AAAI Internatonal Conference on Weblogs and Social Media",
  publisher = "AAAI Press",
}