Wei Q and W-C Chiang (1996). “An Integral Method for the Measurement of Technological Progress and Data Envelopment Analysis.” J Systems Science and Systems Engineering 5(1): 75-86.

Wei Q and W-C Chiang (1996). “An Integral Method for the Measurement of Technological Progress and Data Envelopment Analysis.” J Systems Science and Systems Engineering 5(1): 75-86.

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