Barr RS, LM Seiford and TF Siems (1993). “An Envelopment-Analysis Approach to Measuring the Managerial Efficiency of Banks.” Ann Oper Res 45(1-4): 1-19.

Barr RS, LM Seiford and TF Siems (1993). “An Envelopment-Analysis Approach to Measuring the Managerial Efficiency of Banks.” Ann Oper Res 45(1-4): 1-19.

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