1. Abate, T., Alene, A. D., Bergvinson, D., Silim, S., Orr, A. & Asfaw, S. (2011). Tropical legumes in Africa and South Asia: Knowledge and opportunities (TL II Research Report No. 1). ICRISAT-Nairobi. https://hdl.handle.net/10568/88195
2. Farmers’ agronomic and social evaluation of productivity, yield and N2-fixation in different cowpea varieties and their subsequent residual N effects on a succeeding maize crop
3. Akibonde, S. & Maredia, M. (2011). Global and regional trends in production, trade and consumption of food legume crops (pp. 83). Department of Agricultural, Food and Resource Economics, Michigan State University. https://doi.org/10.22004/ag.econ.136293
4. Cowpea (Vigna unguiculata (L.) Walp.) (Fabaceae) landrace diversity in Northern Ethiopia
5. Alemu, S. (2015). Cowpea (Vigna unguiculata (L.) Walp.) (Fabaceae) Landrace Diversity in southern Ethiopia [MSc Thesis]. Addis Ababa University.