Guo J-P, Y-H Wu and W-H Li (2003). “Study on Feasibility of Variable Returns-to-Scale Based Super-Efficiency Data Envelopment Analysis Model.” J Systems Engineering 18(6): 511-514.

Guo J-P, Y-H Wu and W-H Li (2003). “Study on Feasibility of Variable Returns-to-Scale Based Super-Efficiency Data Envelopment Analysis Model.” J Systems Engineering 18(6): 511-514.

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