Bahadır, Seda. “The Interactions Among Air Freight, GDP, Energy Usage and Ecological Footprint: An Empirical Investigation from Turkey”. International Journal of Energy Economics and Policy 12, no. 6 (November 28, 2022): 332–339. Accessed December 4, 2024. https://econjournals.com./index.php/ijeep/article/view/13753.