7Luh Yir-Hueih and Spiro E. Stefanou. "Productivity Growth in U. S. Agriculture Under Dynamic Adjustment', American Journal of Agricultural Economics 73,1991, pp. 1116-1125.
8Pinstrup-Andersen, Per; Cohen, Marc J. 2002. Achieving sustainable food security for all by 2020. In Development Assistance Strategies in the 21st Century: Global and Regional Issues, Vol. 1: JBICI Research Paper 16-1: 57-153. Tokyo: Japan Bank for International Cooperation.
9iao, Xinshen; Diaz-Bonilla, Eugenio; Robinson, Sherman. 2003. Poor countries would gain from open agricultural markets: a technical note. In Agriculture in the Global Economy: Hunger 2003. 13th Annual report on the state of world hunger. Pp. 122- 156. Washington, D.C. Bread for the World.
