Venkatachary, Sampath Kumar, et al. “Application of Strengths, Weakness, Opportunities, and Threats Analysis in Smart Grid - Virtual Power Plant for Sustainable Development in India and Botswana”. International Journal of Energy Economics and Policy, vol. 7, no. 4, Sept. 2017, pp. 126-37, https://econjournals.com./index.php/ijeep/article/view/5143.