Kargar R. Evaluating Urban Efficiency in Air Pollution Management: A DEA Study of 20 Iranian Cities. Int. J. Oper. Res. Artif. Intell. [Internet]. 2025 Sep. 16 [cited 2025 Dec. 10];1(3):131-8. Available from: https://mail.ijorai.reapress.com/journal/article/view/74