Харченко, В.П., Ю.В. Чинченко, Д.Г. Бабейчук, and С.Г. Райчев. “Evaluation of Safety in the System of Air Traffic”. Proceedings of National Aviation University 32, no. 2 (February 1, 2007): 22–27. Accessed April 27, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/1470.