Hosseini Falehi, S.V.-A. et al. 2025. Designing a Structural Model for Implementing Maintenance 4.0 in Iran’s Oil and Gas Industry with a Sustainability-Oriented Approach. International Journal of Mathematical Modelling & Computations. (Jul. 2025). DOI:https://doi.org/10.57647/ijm2c.2026.1604.23.