Ali AI, WD Cook and LM Seiford (1991). “Strict vs. Weak Ordinal Relations for Multipliers in Data Envelopment Analysis.” Management Science 37(6): 733-738.

Ali AI, WD Cook and LM Seiford (1991). “Strict vs. Weak Ordinal Relations for Multipliers in Data Envelopment Analysis.” Management Science 37(6): 733-738.

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