Malaudzi, Sophie T., Vaithianathaswami Sankaran, and Meena D. Lysko. “Solar Radiation Analysis and Regression Coefficients for the Vhembe Region, Limpopo Province, South Africa”. Journal of Energy in Southern Africa 24, no. 3 (August 1, 2013): 2–7. Accessed July 22, 2024. https://journals.assaf.org.za/index.php/jesa/article/view/3136.