1Peters, T. and R.Waterman, In Research of Excellence, New York:Warner Books,1982.
2Prahalad,C.K. & Hamel,G.,"The Core Competence of the Corporation" Harvard Business Review,1990.
3Goold M., Campbell A, Alexander M., Corporate Strategy: the Quest for Parenting Advantage. New York :John Wiley & Sons, Inc., 1994.168-176,191-205
4Grant, R., A. Jammine and H. Thomas, Diversity, Diversification, and Profitability Among British Manufacturing Companies, 1972-1984 Academy of Management Journal, December,1988:771-801
5Dwyer,F. Robert,Schurr, Paul H., and Oh, Sejo,"Developing Buyer Seller Relations", Joural of Marketing, 1987,51(April), 11-28.
6Reichheld, Frederick F., and Thomas Teal, The Loyalty Effect, Bostom, MA: Business School Press1996.
7Reichheld, Frederick F., "The loyalty effect the relationship between loyalty and profits", European Business Journal, 2000,12(3) : 173-179
8Wrigley L., Divisional Autonomy and Diversification (Unpublished Doctoral Dissertation). Cambridge, MA: Harvard Business School, 1970
9Rumelt R P. Strategy, Structure and Economic Performance. Cambridge, MA: Harvard University Press, 1974
10Palepu K., Diversification Strategy, Profit Performance and the Entropy Measure. Strategic Management Journal, 1985, 6:239-255.
