Kharchenko, Volodymyr, and Yuriy Chynchenko. “INTEGRATED RISK PICTURE METHODOLOGY FOR AIR TRAFFIC MANAGEMENT IN EUROPE”. Proceedings of National Aviation University 54, no. 1 (April 4, 2013): 15–20. Accessed December 3, 2023. https://jrnl.nau.edu.ua/index.php/visnik/article/view/3857.