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.

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