Борсук, С. П. “Fuzzy Entropy of Distinguishing Air Traffic Control Students Risk Level During Horizontal Flight Norms Violation”. Problems of Informatization and Control 3, no. 51 (September 25, 2015): 14–18. Accessed June 14, 2026. http://jrnl.kai.edu.ua/index.php/PIU/article/view/10303.