Saen RF, A Memariani and FH Lotfi (2005). “The Effect of Correlation Coefficient among Multiple Input Vectors on the Efficiency Mean in Data Envelopment Analysis.” Appl Math Comput 162(2): 503-521.

Saen RF, A Memariani and FH Lotfi (2005). “The Effect of Correlation Coefficient among Multiple Input Vectors on the Efficiency Mean in Data Envelopment Analysis.” Appl Math Comput 162(2): 503-521.

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