1. Anandajayasekeram, P., Stilwell, T., 1998. Institutionalisation of the farming systems approach: lessons from eastern and southern Africa. In: Anadajayasekeram, P., Stilwell, T. (Eds.), Institutionalisation of the Farming Systems Approach in Eastern and Southern Africa. SAAFSR-E, Swaziland, and FARMESA, Zimbabwe, pp. 3–26.
2. Resource Poor Farmers Participation in Research: A Synthesis of Experiences in Nine National Agricultural Research Systems. OFCOR Comparative Study Paper No. 3;Biggs,1989
3. Rainfall, tie-ridging and crop yields;Brown;Empire Cotton Growing Review,1963
4. Planning Technologies Appropriate to Farmers — Concepts and Procedures;Byerlee,1980
5. Agricultural research for resource poor farmers: the farmer-first-and-last model;Chambers;Agricultural Administration and Extension,1985