Kalashnyk-Rybalko, Myroslava. “FEATURES OF PROVISION OF SUSTAINABLE NAVIGATION AIDS FUNCTIONING UNDER HELIOGEOPHYSIC DISTURBANCES”. Proceedings of National Aviation University 75, no. 2 (November 13, 2018): 35–42. Accessed May 4, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/13115.