Abdol Rahim, Fatin Hamizah, Norliza Mohd Noor, Haslaile Abdullah, and Bayram Annanurov. “Cost Minimization of Aircraft Critical Components for Planning and Maintenance Requirements”. International Journal of Integrated Engineering 12, no. 7 (August 3, 2020): 40-53. Accessed October 27, 2021. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/6608.