1. Amanor‐Boadu, V. and Martin, L.J. (1992),Vertical Strategic Alliances in Agriculture, George Morris Centre, Guelph, Ontario, Canada.
2. Banker, D. and Perry, J. (1999), “More farmers contracting to manage risk”,Agricultural Outlook, Economic Research Service, US Department of Agriculture, January‐February, pp. 6‐7.
3. Measurement Cost and the Organization of Markets
4. The Nature of the Firm
5. Ebbertt, J. (1998), “The impacts of biotechnology on the grain processing industry”,AgBioForum, Vol. 1 No. 2, pp. 78‐80, http://www.agbioforum.missouri.edu