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2. Metcalfe's Law is wrong;Briscoe,2006
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4. T. O’Reilly, 2005, What is Web 2.0? Design Patterns and Business Models for the Next Generation of Software, September 30, 2005, http://www.oreillynet.com/pub/a/oreilly/tim/news/2005/09/30/what-is-web-20.html.
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