Lewin AY, LM Seiford and WW Cooper (1994). “Basic DEA Models.” in Charnes A, WW Cooper, AY Lewin and LM Seiford (eds.) Data Envelopment Analysts: Theory, Methodology, and Applications, Kluwer: 23-47.

Lewin AY, LM Seiford and WW Cooper (1994). “Basic DEA Models.” in Charnes A, WW Cooper, AY Lewin and LM Seiford (eds.) Data Envelopment Analysts: Theory, Methodology, and Applications, Kluwer: 23-47.

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