Darko, Ransford Opoku, et al. “Irrigated Agriculture for Food Self-Sufficiency in the Sub-Saharan African Region”. International Journal of Agricultural and Biological Engineering, vol. 13, no. 3, June 2020, pp. 1-12, https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/4397.