1. Baeza-Yates, R.A., Ribeiro-Neto, B.: Modern Information Retrieval. Addison-Wesley Longman Publishing Co., Inc., Boston (1999)
2. Java, A., Song, X., Finin, T., Tseng, B.: Why we twitter: understanding microblogging usage and communities. In: Proceedings of the 9th WebKDD and 1st SNA-KDD 2007 Workshop on Web Mining and Social Network Analysis, WebKDD/SNA-KDD 2007, pp. 56–65. ACM, New York (2007)
3. Lin, C.Y., Hovy, E.: Automatic evaluation of summaries using n-gram co-occurrence statistics. In: Proceedings of the 2003 Conference of the North American Chapter of the Association for Computational Linguistics on Human Language Technology, NAACL 2003, vol. 1. Association for Computational Linguistics, Stroudsburg (2003)
4. Mitchell, T.: Machine Learning. McGraw-Hill Education (ISE Editions) (October 1997)
5. Sakaki, T., Matsuo, Y.: How to become famous in the microblog world. In: ICWSM (2010)