Bashir, F. ., H. ur . Rehman, I. S. Chaudhry, and A. . Bakar. “A Panel Data Analysis of Energy Consumption and Trade Openness in Developing Countries”. Pakistan Journal of Social Sciences, vol. 36, no. 1, June 2016, pp. 373-86, http://pjss.bzu.edu.pk/index.php/pjss/article/view/423.