1. Biomass Energy-Focus on Wood Waste,2004
2. Biomethane from Biomass, Biowaste and Biofuels;Wilkie,2008
3. Effect of some organic wastes on the biogas yield from carbonated soft drink sludge;Uzodinma;Sci. Res. Essays,2008
4. An insight into the status of biogas digesters technologies in South Africa with reference to the Eastern Cape Province;Mukumba;Fort Hare Pap.,2012
5. Influence of Environmental Conditions on Methanogenic Compositions in Anaerobic Biogas Reactors