1Agichtein,E.,Castillo,C.,Donato,D.,Gionis,A.,&Mishne,G.(2008).Finding high-quality contentin social media.Paper presented at the WSDM conference onFebruary11.12,2008,Palo Alto,California,USA.
2Baum,M.A.,&Groeling,T.(2008).New mediaand the polarization of American political discourse.PoliticalCommunication,25(4),345-365.
3Berelson,B.,&Steiner,G.A.(1964).HumanBehavior and Inventory of Scientific Findings.New York:Harcourt,Brace&World Inc.p.550.
6Bucy,E.P.,Gantz,W.,&Wang,Z.(2007).Media Technology and the24‐Hour News.
7Cycle.In C.A.Lin&D.J.Atkin(Eds.),Communication Technology and Social.
8Change:Theory and Implications(pp.143‐163).Mahwah,NJ:Lawrence Erlbaum Associates.
9Case,D.O.,Johnson,D.,Andrews,J.,E.,Allard,S.L.,&Kelly,K.M.(2004).From two step flow to the Internet:The changin array of sources for genetics information seeking.Journal of the American Societyfor Information Science and Technology,55(8),660-669.