Nastos, George. “European Union’s Energy Security in the Aftermath of Russia’s War in Ukraine: From Dependence to Independence”. HAPSc Policy Briefs Series 3, no. 2 (December 29, 2022): 153–160. Accessed March 29, 2024. https://ejournals.epublishing.ekt.gr/index.php/hapscpbs/article/view/33795.