Li Zhao Ruixi Yuan Xiaohong Guan Mingyang Li Propagation Modeling and Analysis of Incidental Topics in Blogosphere. 401-410 2009 HCI (12) http://dx.doi.org/10.1007/978-3-642-02774-1_44 conf/hci/2009-12 db/conf/hci/hci2009-12.html#ZhaoYGL09