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http://www.pewinternet.org/Reports/2010/Online-News.aspx
2. CNN research,
http://www.freshnetworks.com/blog/2010/10/cnn-pownar-research-news-sharing-social-media/
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5. Hsu, C., Lin, J.: Acceptance of blog usage: The roles of technology acceptance, social influence and knowledge sharing motivation. Information & Management 45, 65–74 (2008)