@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 International Conference on Web and Social Media", publisher = "AAAI", }