ХАРЧЕНКО, В.; ЧИНЧЕНКО, Ю.; РАЙЧЕВ, С.; ЛУППО, О. Risk assessment in air navigation system methods of the theory of fuzzy sets. Proceedings of National Aviation University (archive), [S. l.], v. 34, n. 1, p. 3–7, 2008. DOI: 10.18372/2306-1472.34.1521. Disponível em: https://jrnl.kai.edu.ua/index.php/visnik/article/view/1521. Acesso em: 11 apr. 2026.