Беляевский Л. C., А. П. Сушич, and И. Ф. Шешин. “Optimization of Spatial Configurations of Radio-Navigation System Location”. Proceedings of National Aviation University 7, no. 3-4 (December 15, 2000): 292–295. Accessed May 2, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/11305.