Takeda A and H Nishino (2001). “On Measuring the Inefficiency with the Inner-Product Norm in Data Envelopment Analysis.” EJOR 133(2): 377-393.
Takeda A and H Nishino (2001). “On Measuring the Inefficiency with the Inner-Product Norm in Data Envelopment Analysis.” EJOR 133(2): 377-393.