8Lawrence P.R, Lorsch J.W. Organization and envi ronment: managing: differentiation and integration [M].Boston, Mass: Harvard Business School Press, 1967.
9Prahalad C.K, Hamel G. The Core Competence ofth e Corporation [J].Harvard Business Review,May-June, 1990.
10Ansoff H.I. Corporate Strategy:An Analytic Approach to Business Policy for Growth and Expansion. NewYork: McGraw-Hill,1965.