Vencheh AH, RK Matin and MT Kajani (2005). “Undesirable Factors in Efficiency Measurement.” Appl Math Comput 163(2): 547-552.
Vencheh AH, RK Matin and MT Kajani (2005). “Undesirable Factors in Efficiency Measurement.” Appl Math Comput 163(2): 547-552.