1. National Planning Commission, “National Development Plan (2030),” 2010. doi: ISBN: 978-0-621-41180-5.
2. A critical look at South Africa’s green drop programme;Ntombela;Water SA,2016
3. S. A. Mitchell, M. P. de Wit, J. N. Blignaut, and D. Crookes, “Waste Water Treatment Plants : The Financing Mechanisms Associated with Achieving Green Drop Rating,” Pretoria, South Africa, 2014. [Online]. Available: http://www.wrc.org.za/wp-content/uploads/mdocs/2085-1-14.pdf.
4. Department of Energy, “The South African Energy Sector Report 2019,” Pretoria, 2019. [Online]. Available: http://www.energy.gov.za.
5. Characterizations of biomasses for subsequent thermochemical conversion : a comparative study of pine sawdust and Acacia Tortilis;Charis;Processes,2020