Estimation of the Optimum Period for the Replacement of Machines Using the Age Replacement Model Under the Minimum Cost Criterion. Al-Rafidain J Sci [Internet]. 2022 Dec. 31 [cited 2024 Nov. 19];52(2):1-10. Available from: https://alhadhar.com/raf-journal/index.php/JAUCS/article/view/537