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References
Everett M. Rogers. Diffusion of Innovations, Fifth Edition. New York: Free Press, 2003: p. 37.Everett M. Rogers. Diffusion of Innovations, Fifth Edition. New York: Free Press, 2003: p. 281.Moore, Geoffrey A. Crossing the Chasm, Revised Edition, 1999. New York: Harper Business, 1999: pps 1014.
