1. Andrews, P.W.S. 1949. Manufacturing business. London: Macmillan.
2. Bain, J.S. 1956. Barriers to new competition. Cambridge, MA: Harvard University Press.
3. Baumol, W.J. 1967. Business behavior, value and growth. Rev. ed. New York: Harcourt Brace and World.
4. Bhagwati, J.N. 1970. Oligopoly theory, entry-prevention, and growth. Oxford Economic Papers 22: 297–301.
5. Chamberlin, E.H. 1933. The theory of monopolistic competition: A reorientation of the theory of value. Cambridge, MA: Harvard University Press.