Cooper WW, LM Seiford, E Thanassoulis and SH Zanakis (2004). ?DEA and its Uses in Different Countries.” EJOR 154(2): 337-344.

Cooper WW, LM Seiford, E Thanassoulis and SH Zanakis (2004). ?DEA and its Uses in Different Countries.” EJOR 154(2): 337-344.

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