Gerami, Javad. “A Two-Stage Approach for Modelling Undesirable Outputs in DEA With Production Trade-Offs: A Case on Chain Stores”. International Journal of Mathematical Modelling & Computations 15, no. 4 (September 8, 2025). Accessed January 17, 2026. https://oiccpress.com/ijm2c/article/view/17040.