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Online Book: Networks, Crowds, and Markets, http://www.cs.cornell.edu/home/kleinber/networks-book/.
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M. E. J. Newman, Networks: an introduction, Oxford University Press, Oxford, 2010.
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S. Zhou and R. J. Mondragon, IEEE Communications Letters, 2004, 8, 180–182.
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D. Easley and J. Kleinberg, Networks, crowds, and markets: reasoning about a highly connected world, Cambridge University Press, Cambridge, 2010.
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M. E. J. Newman, Networks: an introduction, Oxford University Press, Oxford, 2010.