Reinhard S, CAK Lovell and GJ Thijssen (2000). “Environmental Efficiency with Multiple Environmentally Detrimental Variables; Estimated with Sfa and DEA.” EJOR 121(2): 287-303.

Reinhard S, CAK Lovell and GJ Thijssen (2000). “Environmental Efficiency with Multiple Environmentally Detrimental Variables; Estimated with Sfa and DEA.” EJOR 121(2): 287-303.

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