Ударцев, Е. П., and Л. А. Журавлева. “Concept of Investigation of No-Failure System ‘airplane-Crew-Medium’ With the Account of the Indefiniteness Factor”. Proceedings of National Aviation University 1, no. 1 (January 30, 1998): 433–439. Accessed May 7, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/11162.