ОСТРОУМОВ, І. The concept of "Mobile sky". Proceedings of National Aviation University (archive), [S. l.], v. 40, n. 3, p. 91–95, 2009. DOI: 10.18372/2306-1472.40.1751. Disponível em: https://jrnl.kai.edu.ua/index.php/visnik/article/view/1751. Acesso em: 7 apr. 2026.