Ha, Nguyen Minh, and Nguyen Duy Hoang. “Applying the CAPM Model in Identifying the Electricity Retail Price in Ho Chi Minh City, Vietnam”. International Journal of Energy Economics and Policy, vol. 7, no. 2, Apr. 2017, pp. 185-92, https://econjournals.net.tr/index.php/ijeep/article/view/4383.