%0 Journal Article %A Seyfpanah, Mohhamad %T Identification of congestion in two-stage data envelopment analysis %J International Journal of Data Envelopment Analysis %V 9 %N 3 %P 65-76 %D 2021 %R 10.30495/ijdea.2022.68510.1172 %U https://sanad.iau.ir/fa/Article/826331