Malik S, Upma. COST-BENEFIT ANALYSIS OF A SYSTEM OF NON- IDENTICAL UNITS UNDER PREVENTIVE MAINTENANCE AND REPLACEMENT. JRSS [Internet]. 2020 Aug. 18 [cited 2026 May 15];9(02):17-2. Available from: https://journals.riverpublishers.com/index.php/JRSS/article/view/20991