7Panzar, John C. and Willig, Robert D. Economic of scale and economic of scope in multi-output production, Economics Discussion Paper, No. 33, Bell Laboratories, 1975.
8Besanko, David, Dranove, David and Shanley, Mark. The Economies of Strategy. John Wiley & Sons, Inc. New York., 1996.
3Besanko, David, Dranove, David and Shanley, Mark(1996), "The Economics of Strategy", John Wiley & Sons,Inc ,New York.
4Henderson, Rebecca and Cockburn, lain( 1994), "Scale,Scope, and Spillovers: Research strategy and research productivity in the Pharmaceutical Industry", Massachusetts Institute of Technology, Working Paper.
5Milgrom, P and J Roberts (1986), "Price and advertising signals of product quality", Journal of Political Economy, No. 94, pp. 796-821.
6Nathanson, Daniel and Cassano, James (1982), "What happens to profits when a company diversifies?" Wharton Magazine, Summer 1982 , pp. 19-26.
7Panzar, John C and Willig, Robert D.(1975),"Economic of scale and economic of scope in multi - output production", Economics Discussion Paper, No. 33, Bell Labo-ratories.
8Panzar, John C and Willig, Robert D,(1981), "Economy of scope", AEA Papers and Proceedings, Vol. 71, No. 2, pp. 268-72.
9Pine, B J. (1993), Mass Customization : The New Frontier in Business Competition, Cambridge, MA: Harvard University Press.
10Sutton, J. (1992), Sunk Costs and Market Structure,Cambridge, MA. : MIT Press.
