number of social bookmarking sites for news have emerged. CommonMedia, my network, launched CommonTimes, a social bookmarking site dedicated to news and the blogosphere
J. Tang, J. Zhang, L. Yao, and J. Li. Proceeding of the 17th international conference on World Wide Web, page 1193--1194. New York, NY, USA, ACM, (2008)
U. Brandes, P. Kenis, J. Lerner, and D. van Raaij. WWW '09: Proceedings of the 18th international conference on World wide web, page 731--740. New York, NY, USA, ACM, (2009)