Wang X (1994). “Data Envelopment Analysis Approach on the Industrial Efficiency and Scales and its Application in Shandong.” J Systems Science and Systems Engineering 3(2): 140-147.
Wang X (1994). “Data Envelopment Analysis Approach on the Industrial Efficiency and Scales and its Application in Shandong.” J Systems Science and Systems Engineering 3(2): 140-147.