Kharchenko, Volodymyr, and Yuriy Chynchenko. “INTEGRATED SAFETY MANAGEMENT SYSTEM IN AIR TRAFFIC SERVICES”. Proceedings of National Aviation University 58, no. 1 (June 25, 2014): 6–10. Accessed June 12, 2025. https://jrnl.nau.edu.ua/index.php/visnik/article/view/6630.