Rosado Anastacio, Joel Alejandro. “Economic Growth, CO2 Emissions and Electric Consumption: Is There an Environmental Kuznets Curve? An Empirical Study for North America Countries”. International Journal of Energy Economics and Policy, vol. 7, no. 2, Apr. 2017, pp. 65-71, https://econjournals.net.tr/index.php/ijeep/article/view/4068.