Samaraweera, A.S.A. “Will There Be an Open Sky Again? The Impact on COVID-19 on the Airline Industry”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 52, no. 1 (June 6, 2020): 173–180. Accessed May 17, 2024. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/11211.