1. Ngaiza E, Butare A. Biogas technology in Tanzania, 1992.
2. Mwandosya MJ, Lwakabamba S, Nkonoki SR. Proceedings of Regional Workshop on Energy for Development in Eastern and Southern Africa, Arusha, 1983, Tanzania.
3. Mwihava N, Towo A. A study on energy projects and their effective utilisation, 1994.
4. Lutenganya Prosper. Project proposal on research and development of biomass energy in Tanzania, 1989.
5. UNIDO programme document: Biomass energy for industrial development in Tanzania, 1995.