Ragulina, Yulia Vyacheslavovna, Aleksei Valentinovich Bogoviz, Svetlana Vladislavlevna Lobova, and Alexander Nikolaevich Alekseev. “An Aggregated Energy Security Index of Russia, 1990-2015”. International Journal of Energy Economics and Policy 9, no. 1 (December 7, 2018): 212–217. Accessed April 19, 2025. https://mail.econjournals.org.tr/index.php/ijeep/article/view/7209.