Abbasi, M. .; Kaviani, S. .; Sheikhian, L. . Risk Ranking of Oil and Gas Projects in the Exploitation Phase: An OPA-Based Case Study of the National Iranian Oil Company. Int. J. Oper. Res. Artif. Intell. 2025, 1 (3), 121-130. https://doi.org/10.48314/ijorai.v1i3.72.