1. IPCC, Synthesis Report. Contributing of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. [Internet], 2014, Geneva, Switzerland, Available from https://www.ipcc.ch/pdf/assessment-report/ar5/syr/SYR_AR5_FINAL_full.pdf [Accessed: 2016-03-18].
2. Maneesha P., Bhaskarwar A.N., Biomass conversion to energy, In: Biomass Conversion the Interface of the Biotechnology. Chemistry and Material Science, Berlin, Heidelberg. 2012, Springer. p. 116.
3. FAO, Global Assessment of Growing Stock, Biomass and Carbon Stock [Internet], 2006, Rome, Available from: ftp://ftp.fao.org/docrep/fao/010/ah849e/ah849e00.pdf [Accessed: 2016-03-18].
4. Lantz M., Svensson M., Björnsson L., Börjesson, The prospect for an expansion of biogas system in Sweden-Incentives, barriers and potentials, Energy Policy, 2007, 35, 1830-1843.
5. Deepanraj B., Sivasubramanian V., and Jayaraj S., Biogas generation through anaerobic digestion process: An overview, Research Journal of Chemistry and Environment, 2014, 18(5), 80-94.