Jimenez-Islas, D., Perez-Romero, M. E., Cruz, I. V., & Flores-Romero, M. B. (2021). Development of Biofuels Research in South Africa. International Journal of Energy Economics and Policy, 11(5), 99–105. Retrieved from https://mail.econjournals.com/index.php/ijeep/article/view/11454