K. C. Bowa, M. Mwanza, M. Sumbwanyambe, K. Ulgen, and J. Pretorius "Assessment of Electricity Industries in SADC Region Energy Diversification and Sustainability", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 894–906, 2021, doi: 10.25046/aj0602102.