Najafi, M. .; Faroughi, H. . Opportunistic Maintenance Modeling in a Closed-Loop Supply Chain: The Impact of Spare Parts Material, Technician Skill, and Environmental Conditions. Sup. Chain. Oper. Decis. Mak. 2025, 2 (4), 234-251. https://doi.org/10.48313/scodm.v2i4.47.