Якушенко, О.С. “Diagnosing Technical Condition of Gas Turbine Engines by Building a Binary Tree”. Proceedings of National Aviation University (archive) 33, no. 3-4 (March 1, 2007): 73–76. Accessed April 17, 2026. http://jrnl.kai.edu.ua/index.php/visnik/article/view/1501.