Lizunkov, Vladislav, Ekaterina Politsinskaya, Elena Malushko, Alexandr Kindaev, and Mikhail Minin. 2018. “Population of the World and Regions As the Principal Energy Consumer”. International Journal of Energy Economics and Policy 8 (3):250-57. https://www.econjournals.com/index.php/ijeep/article/view/6182.