1. Alm, C.O.: Affect in Text and Speech. PhD Dissertation. University of Illinois at Urbana- Champaign (2008)
2. Lecture Notes in Artificial Intelligence;S. Aman,2007
3. Aman, S.: Identifying Expressions of Emotion in Text, Master’s thesis, University of Ottawa, Ottawa, Canada (2007)
4. Arora, S., Mayfield, E., Penstein-Ros, C., Nyberg, E.: Sentiment Classification using Automatically Extracted Subgraph Features. In: Proceedings of the NAACL HLT 2010 Workshop on Computational Approaches to Analysis and Generation of Emotion in Text (2010)
5. Ekman, P., Friesen, W.V.: Facial action coding system: Investigator’s guide. Consulting Psychologists Press, Palo Alto (1978)