Харченко, В.П., and В.А. Лазоренко. “Principles for Improving Modular Simulators for Practical Training of Air Traffic Controllers”. Proceedings of National Aviation University 33, no. 3-4 (March 1, 2007): 3–8. Accessed December 21, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/1487.