CIFUENTES-FAURA, Javier; FAURA-MARTÍNEZ, Ursula. Situation of European airlines caused by COVID-19: restrictions, government subsidies and future prospects. Aviation, [S. l.], v. 25, n. 4, p. 232–240, 2021. DOI: 10.3846/aviation.2021.15882. Disponível em: https://journals.vilniustech.lt/index.php/Aviation/article/view/15882. Acesso em: 11 may. 2025.