Nordin, S. K. B. S., and S. K. Sek. “Investigating the Relationship on CO2, Energy Consumption and Economic Growth: A Panel Data Approach”. Journal of Reviews on Global Economics, vol. 8, Sept. 2019, pp. 637-42, https://www.lifescienceglobal.com/pms/index.php/jrge/article/view/6130.