1. Sukhatme, S.(2012) Can India's future needs of electricity be met by renewable energy sources? A revised assessment. Current Science 1153–1161.
2. Yao, Z., et al.: Anaerobic digestion and gasification hybrid system for potential energy recovery from yard waste and woody biomass. Energy 124, 133–145 (2017)
3. Maya, D.M.Y., et al.: Gasification of municipal solid waste for power generation in Brazil, a review of available technologies and their environmental benefits. J. Chem. Chem. Eng. 10, 249–255 (2016)
4. Pegels, A.: Renewable energy in South Africa: potentials, barriers and options for support. Energy policy 38(9), 4945–4954 (2010)
5. Goosen, C., Assessing the economic viability of biogas plants at abattoirs in South Africa. 2013.