Sanchez-Loor, Daniel Alejandro, and Manuel A. Zambrano-Monserrate. “Causality Analysis Between Electricity Consumption, Real GDP, Foreign Direct Investment, Human Development and Remittances in Colombia, Ecuador and Mexico”. International Journal of Energy Economics and Policy, vol. 5, no. 3, July 2015, pp. 746-53, https://econjournals.com/index.php/ijeep/article/view/1271.