Luppo, Oleksandr, Gennadiy Argunov, and Andrii Mohyla. “CONCEPT OF ADVANCED FLEXIBLE USE OF AIRSPACE”. Proceedings of National Aviation University 67, no. 2 (June 21, 2016): 22–28. Accessed December 21, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/10428.