du Plessis, Martin, Joubert van Eeden, and ME Botha. “DEVELOPMENT OF EMISSION INTENSITY FACTORS FOR A SOUTH AFRICAN ROAD-FREIGHT LOGISTICS SERVICE PROVIDER”. The South African Journal of Industrial Engineering 33, no. 3 (November 11, 2022): 15–28. Accessed October 8, 2024. https://sajie.journals.ac.za/pub/article/view/2788.