Kalashnyk-Rybalko M. FEATURES OF PROVISION OF SUSTAINABLE NAVIGATION AIDS FUNCTIONING UNDER HELIOGEOPHYSIC DISTURBANCES. Proceedings of National Aviation University [Internet]. 2018 Nov. 13 [cited 2024 Nov. 27];75(2):35-42. Available from: https://jrnl.nau.edu.ua/index.php/visnik/article/view/13115