Mousavi SM, Gerami J, Mozaffari M, Pour Ahari RM, Feylizadeh M. Development of a Hybrid XGBoost–Fuzzy Robust DEA Model for Evaluating the Operational and Environmental Efficiency of Petrochemical Companies Considering Undesirable Outputs and Uncertainty. MSES. 2025;7(6):1-17. Accessed October 3, 2026. https://msesj.com/index.php/mses/article/view/533