1. Aggarwal, C.C., Zhai, C. (eds.): Mining Text Data. Springer (2012) ISBN 978-1-4614-3222-7
2. Banea, C., Mihalcea, R., Wiebe, J.: Multilingual Sentiment and Subjectivity Analysis. In: Multilingual Natural Language Processing. Prentice Hall (2012) ISBN 10: 0137151446
3. Beci, B.: Gramatika e gjuhes shqipe. Logos-A (2005) ISBN 9989580197
4. Dave, K., Lawrence, S., Pennock, D.: Mining the peanut gallery: Opinion extraction and semantic classification of product reviews. In: Proc. of Int’l Conf. on World Wide Web, WWW 2003 (2003)
5. Jindal, N., Liu, B.: Mining comparative sentences and relations. In: Proceedings of National Conf. on Artificial Intelligence, AAAI 2006 (2006)