Kharchenko, Volodymyr, Oleksandr Luppo, Wang Bo, Gennadiy Argunov, Denys Vasyliev, and Karyna Raksha. “ANALYSIS OF THE FLIGHT OBJECT CONCEPT”. Proceedings of National Aviation University 63, no. 2 (September 17, 2015): 7–11. Accessed November 22, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/8826.