Estimation of the Optimum Period for the Replacement of Machines Using the Age Replacement Model Under the Minimum Cost Criterion. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), [S. l.], v. 52, n. 2, p. 1–10, 2022. DOI: 10.55562/jrucs.v52i1.537. Disponível em: https://jrucs.iq/index.php/JAUCS/article/view/537. Acesso em: 9 jun. 2026.