1. 1957. Report on the detailed soil survey of the Central Agricultural Station, Nyankpala. Soil Research Institute: Kumasi, Ghana.
2. Evaluating the use of two contrasting legume species as relay intercrop in upland rice cropping systems
3. Center for New Crops and Plant Products. 2002. Cajanus cajan (L.) Millsp. Purdue University: IN.
4. 1987. Screening for tolerance to salinity and water logging: case studies with pigeon pea and chickpea. In Adaptation of Chickpea and Pigeon Pea to Abiotic Stresses. Proceedings of Consultants' work 19-21.December 1984, ICRISAT: Patancheru.