ABD ALLA IBRAHEM AHMED, F. ., & RAHAMTALLA KHEDIR GENAWI, K. . (2025). Environmental-Adjusted Operational Efficiency Analysis of Insurance Companies: An Application of the Three-Stage Data Envelopment Analysis Model. Journal of Omdurman Islamic University Applied Sciences, 21(3), 65–87. https://doi.org/10.52981/ oiujas.v21i3.3397