Луппо, О.Є., В.А. Лазоренко, and А.С. Губаренко. “Performance Based Navigation”. Proceedings of National Aviation University 43, no. 2 (February 1, 2010): 62–65. Accessed January 20, 2025. https://jrnl.nau.edu.ua/index.php/visnik/article/view/1850.