ЛУППО, О. Є.; ПІГУР, Я. А. Definition of indicators to assess the operational safety and environment definition of the elements of air navigation systems. Proceedings of National Aviation University (archive), [S. l.], v. 55, n. 2, p. 27–32, 2013. DOI: 10.18372/2306-1472.55.5404. Disponível em: http://jrnl.kai.edu.ua/index.php/visnik/article/view/5404. Acesso em: 13 jun. 2026.