9Amit, R., and J. Livnat, Diversification and the Risk-Return Trade - Off[J]. Academy of management, 1988,Vol. 31, No. 1, pp. 154-166.
10Anderson, Erin & Anne T. Coughlan, International Market Entry and Expansion via Independent or Integrated Channels of Distribution[J]. Journal of Marketing, 1987 Jan: 51,71- 82.
