Sibisi, NT, and JM Green. “A Floating Dome Biogas Digester: Perceptions of Energising a Rural School in Maphephetheni, KwaZulu-Natal”. Journal of Energy in Southern Africa 16, no. 3 (August 1, 2005): 45–52. Accessed July 22, 2024. https://journals.assaf.org.za/index.php/jesa/article/view/3115.