3Katz. M. and C. Shapiro, 1985, Network Externalities, Competition and Compatibility, the American Economic Review, Vol. 75, No. 3, pp.424-441.
4Katz. M. and C.Shapim, lgO4,System Competition and Network Effects, Journal of Economic Perspectives, 8, pp. 93-115.
5J.Gilbert and Katz. M,2001,An Eeonomist's Guide to U.S.v. Microsoft, Journal of Economic Perspectives, Vol. 15, No. 2, pp. 25-44.
6J.Farrell and H. K. Monroe, 1998,The Vertical Organization of Industry: Systems Competition Versus Component Competition, Journa/ of Economics & Management Strategy, Vol.7, No.2, pp. 143-182.
7M. Mckelvey, 2001, the Economic Dynamics of Software: the Competing Business Models Exemplified Through Microsoft, Netscape and Linux,Economics of Innovation & New Technology, Vol.10, Issue. 2/3, pp. 199-236.
8S.Evance and Schmalensee, 2001, Some Economic Aspects of Antitrust Analysis in Dynamically Competitive Industries, Working Paper for NBER Conference on Innovation and the Economy, Washington, DC.
9Shy. O and J. F. Thisse, 1999, A Strategic Approach to Software Protection, Journal of Economics and Management Strategy, 8, pp. 163-190.