Unggul Wicaksana Prakasa, Satria, Asri Wijayanti, Achmad Hariri, and Levina Yustitianingtyas. “The Effect of Russia--Ukraine War on International Aviation Sectors”. KnE Social Sciences 7, no. 15 (October 4, 2022): 572–581. Accessed May 1, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/12132.