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), Jordan, v. 52, n. 1, p. 173–180, 2020. Disponível em: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/11211. Acesso em: 22 sep. 2025.