| Primary | Theresa Wilson, Janyce Wiebe, and Paul Hoffmann (2005). Recognizing Contextual Polarity in Phrase-Level Sentiment Analysis, EMNLP-2005. |
| Supplementary | Agarwal, Apoorv and Biadsy, Fadi and Mckeown, Kathleen (2009). Contextual Phrase-Level Polarity Analysis Using Lexical Affect Scoring and Syntactic N-Grams. EACL 2009. |
| Supplementary | Yejin Choi and Claire Cardie (2008). Learning with Compositional Semantics as Structural Inference for Subsentential Sentiment Analysis. EMNLP-2008. |