Li G and J Bai (2000). “Extended DEA and its Application to Making Economic Plan.” Chengdu Kejidaxue Xuebao/J Chengdu University of Science and Technology 32(1): 78-81.

Li G and J Bai (2000). “Extended DEA and its Application to Making Economic Plan.” Chengdu Kejidaxue Xuebao/J Chengdu University of Science and Technology 32(1): 78-81.

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