4Barney,J.B,1991,Firm Resource and Sustained Competitive Advantage.Journal of Management,vol.17.No.1.99-120.
5Demsetz.Harold,The Theory of the Firm Revisited.In Oliver Williamson and Sidney Winter.eds.The Nature of the Firm:Origins Evolution,and.Development.New York:Oxford press.
6Nelson.R and Winter.G.,.1982.An Evolutionary Theory of Economic Change.London:Cambridge Press.
7Penrose,E.T.1959,The Theory of the Growth of the Firm,Oxford:Oxford University Press.
8Rumelt,R.P.,1982,Diversification Strategy and Profitability.Strategic Management Journal,Vol.3:359-369.