D. Boyd, S. Golder, G. Lotan, and T. Tweet, Retweet: Conversational aspects of retweeting on Twitter, System Sciences (HICSS), 2010 43rd Hawaii International Conference, pp.1-10, 2010.

B. Krishnamurthy, P. Gill, and M. Arlitt, A few chirps about twitter, Proceedings of the first workshop on Online social networks, WOSP '08, pp.19-24, 2008.
DOI : 10.1145/1397735.1397741
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.145.1007

H. Kwak, C. Lee, H. Park, and S. Moon, What is Twitter, a social network or a news media?, Proceedings of the 19th international conference on World wide web, WWW '10, pp.591-600, 2010.
DOI : 10.1145/1772690.1772751

H. Mao, X. Shuai, and A. Kapadia, Loose tweets, Proceedings of the 10th annual ACM workshop on Privacy in the electronic society, WPES '11, pp.1-12, 2011.
DOI : 10.1145/2046556.2046558

M. Russell, 21 Recipes for Mining Twitter. Real Time Bks, 2011.