Рябчук, Н. Г., and Л. А. Журавльова. “Construction of Diagnostic Solution With the Use of Non-Digital Expert Estimates”. Proceedings of National Aviation University 3, no. 2 (September 26, 1999): 265–271. Accessed May 6, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/9434.