Ahjum, Fadiel, Bruno Merven, Adrian Stone, and Tara Caetano. “Road Transport Vehicles in South Africa towards 2050: Factors Influencing Technology Choice and Implications for Fuel Supply”. Journal of Energy in Southern Africa 29, no. 3 (September 21, 2018): 33–50. Accessed July 22, 2024. https://journals.assaf.org.za/index.php/jesa/article/view/5596.