KHARCHENKO, V.; ONISHCHENKO, A. THE CURRENT STATE OF DEVELOPMENT OF UNMANNED AERIAL SYSTEMS IN THE STRATOSPHERE. Proceedings of National Aviation University, [S. l.], v. 85, n. 4, p. 37–40, 2020. DOI: 10.18372/2306-1472.85.15136. Disponível em: https://jrnl.nau.edu.ua/index.php/visnik/article/view/15136. Acesso em: 3 may. 2024.