7Carliss Y. Baldwin , and Kim B. Clark, (2000), Design Rules, Volume 1, the Power of Modularity, MIT Press,Cambridge MA.
8Dosi, Giovanni, (1988), Sources, Procedures, and Microeconomic Effects of Innovation, Journal of Economic Literature, Vol 26, 1120- 1171.
9Graud, R. , and Kumaraswamy, A., (1995), Technological and Organizational Designs to Achieve Economies of Substitution, Strategic Management Journal, Vol 16,93 - 110.
10Katz Michael , and Carl Shapiro, ( 1985 ), Network Externalities, Competition, and Compatibility, American Economic Review, June, 75,424 - 40.
