Kharchenko, Volodymyr P., Alexander E. Luppo, and Vitaliy A. Lazorenko. “PERFORMANCE BASED NAVIGATION AND AIRSPACE CONCEPT”. Proceedings of National Aviation University 41, no. 4 (April 1, 2009): 5–8. Accessed April 27, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/1786.