Duan YR, P Tian and WP Zhang (2005). “Relative Efficiency Analysis of Complex System Based on Data Envelopment Analysis.” J Shanghai Jiaotong University 39(3): 433-436.
Duan YR, P Tian and WP Zhang (2005). “Relative Efficiency Analysis of Complex System Based on Data Envelopment Analysis.” J Shanghai Jiaotong University 39(3): 433-436.