1. Energy and economic assessment of anaerobic digesters and biofuels for rural waste management;Abeles,1978
2. Standard methods for the examination of water and wastewater;American Public Health Association (APHA),1975
3. Experiences from operating a full size anaerobic digester;Bartlett,1977
4. Biogas generation and uses on livestock farms;Bartlett,1980
5. Kinetics of methane fermentation;Chen,1978