Altıntas, Halil, and Melike Kum. “Multivariate Granger Causality Between Electricity Generation, Exports, Prices and Economic Growth in Turkey”. International Journal of Energy Economics and Policy, vol. 3, no. S, Sept. 2013, pp. 41-51, https://econjournals.org.tr/index.php/ijeep/article/view/573.