Zambrano-Monserrate, Manuel A., Freddy F. García–Albán, and Kliffer A. Henk-Vera. 2016. “Bounds Testing Approach to Analyze the Existence of an Environmental Kuznets Curve in Ecuador”. International Journal of Energy Economics and Policy 6 (2):159-66. https://econjournals.com/index.php/ijeep/article/view/1831.