Seiford LM and RM Thrall (1990). “Recent Developments in DEA: the Mathematical Programming Appoach to Frontier Analysis.” J Econometrics 4: 7-38.

Seiford LM and RM Thrall (1990). “Recent Developments in DEA: the Mathematical Programming Appoach to Frontier Analysis.” J Econometrics 4: 7-38.

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