Aali-Bujari, Alí, et al. “Impact of Energy Consumption on Economic Growth in Major OECD Economies (1977-2014): A Panel Data Approach”. International Journal of Energy Economics and Policy, vol. 7, no. 2, Apr. 2017, pp. 18-25, https://econjournals.com./index.php/ijeep/article/view/4146.