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.