ГОСУДАРСЬКА, І. Submission spatial vicissitudes fatal risk ground in mathematical form. Proceedings of National Aviation University (archive), [S. l.], v. 27, n. 1, p. 204–206, 2006. DOI: 10.18372/2306-1472.27.1271. Disponível em: http://jrnl.kai.edu.ua/index.php/visnik/article/view/1271. Acesso em: 18 apr. 2026.