6C K Prahalad and Gary Hamel. The Core Competence of the Corporation, Harvard Business Review, May-June 1990,P81.
7B Wemerfelt, A Resource-Based View of the firm, Strategic Management Journal5, 1984, P171 - 180.
8Richard L Priem and John E Bulter, Is the resource-based"view"a useful Perspeetive for strategic management research?,the Academy of Management Review, Jan 2001, P 22- 40.