ŁASKARZEWSKA, Katarzyna. The sources of flight safety in Europe and the USA. Doctrina. Studia społeczno-polityczne, [S. l.], v. 11, n. 11, 2019. Disponível em: https://czasopisma.uph.edu.pl/doctrina/article/view/1449. Acesso em: 3 lip. 2024.