Nouadjep, Narcisse Serge, et al. “Status Quo of Biodiesel Production in Africa: A Review on Technological Options, Policies and Aboriginal Feedstock Potential”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 60, no. 1, Oct. 2019, pp. 93-132, https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/5255.