Takeda E (2000). “An Extended DEA Model: Appending an Additional Input to Make All DMUs at Least Weakly Efficient.” EJOR 125(1): 25-33.

Takeda E (2000). “An Extended DEA Model: Appending an Additional Input to Make All DMUs at Least Weakly Efficient.” EJOR 125(1): 25-33.

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