Hua ZS, YW Bian and L Liang (2007). “Eco-Efficiency Analysis of Paper Mills Along the Huai River: An Extended DEA Approach.” Omega 35(5): 578-587.
Hua ZS, YW Bian and L Liang (2007). “Eco-Efficiency Analysis of Paper Mills Along the Huai River: An Extended DEA Approach.” Omega 35(5): 578-587.