1. Meynell P-J (1976) Methane: planning a digester. C.T.T. series. Prism Press, Dorchester
2. Anaerobic digestion and solids-liquid separation;J McCabe,1956
3. Buysman E (2009) Anaerobic digestion for developing countries with cold climates—utilizing solar heat to address technical challenges and facilitating dissemination through the use of carbon finance. Master Thesis, University of Wageningen, Wageningen
4. Daxiong Q, Shuhua G, Baofen L, Gehua W (1990) Diffusion and innovation in the Chinese biogas program. World Dev 18(4):555–563
5. Pathak H, Jain N, Bhatia A, Mohanty S, Gupta N (2009) Global warming mitigation potential of biogas plants in India. Environ Monit Assess 157(1):407–418