Glushchenko, Valery V. “METHODOLOGY FOR EVALUATING THE EFFECTIVENESS OF MACHINE AND EQUIPMENT MAINTENANCE SYSTEMS”. International Journal of Engineering Science Technologies 5, no. 2 (April 3, 2021): 58-68. Accessed January 17, 2022. https://www.granthaalayahpublication.org/ojs-sys/index.php/ijoest/article/view/IJOEST_166.