Білецький, А. Я., Д. О. Корчунов, and В. П. Харченко. “Principles of Formation of Situation Models of Air Traffic Control Systems”. Proceedings of National Aviation University (archive) 7, no. 3-4 (December 15, 2000): 255–260. Accessed April 13, 2026. http://jrnl.kai.edu.ua/index.php/visnik/article/view/11299.