Trstenjak, Ani, Ivana Tomas Žiković, and Saša Žiković. “How to Make EU Tourism Sector Greener, More Efficient and Sustainable: A Bibliometric Analysis”. International Journal of Energy Economics and Policy 13, no. 2 (March 24, 2023): 77–85. Accessed September 19, 2024. https://econjournals.org.tr/index.php/ijeep/article/view/13926.