Banker RD, WW Cooper, LM Seiford, RM Thrall and J Zhu (2004). “Returns to Scale in Different DEA Models.” EJOR 154(2): 345-362.

Banker RD, WW Cooper, LM Seiford, RM Thrall and J Zhu (2004). “Returns to Scale in Different DEA Models.” EJOR 154(2): 345-362.

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