Wang Y-M, R Greatbanks and J-B Yang (2005). “Interval Efficiency Assessment Using Data Envelopment Analysis.” Fuzzy Sets and Systems 153(3): 347-370.
Wang Y-M, R Greatbanks and J-B Yang (2005). “Interval Efficiency Assessment Using Data Envelopment Analysis.” Fuzzy Sets and Systems 153(3): 347-370.