Munyua, C. N., and I. N. Wagara. “Diversification and a Multidisciplinary Approach for Raising Agriculture Production and Attaining Food Security in Smallholder Farming Systems of Sub-Saharan Africa”. Asian Journal of Agriculture and Rural Development, vol. 5, no. 10, Oct. 2015, pp. 218-24, https://archive.aessweb.com/index.php/5005/article/view/1403.