Ковалевський, Е. О., and В. М. Кондратюк. “Information Maintenance of aircraft’s Automatic Control Using GNSS System”. Proceedings of National Aviation University (archive) 55, no. 2 (May 11, 2013): 40–43. Accessed June 13, 2026. http://jrnl.kai.edu.ua/index.php/visnik/article/view/5409.