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3. Y. Benkler, The Wealth of Networks: How Social Production transforms markets and freedom (Yale University Press, 2006)
4. P.F. Uhlir, The Socioeconomic effects of public sector information on digital networks toward a better understanding (U.S. National Committee for CODATA, 2011)
5. A. Hagiu, J. Wright, Multi-Sided Platforms (Harvard Business School preprint, 2011)