@techreport{DalkmannBongardtRottmannetal.2005, author = {Dalkmann, Holger and Bongardt, Daniel and Rottmann, Katja and Hutfilter, Sabine}, title = {Review of voluntary approaches in the European Union : feasibility study on demonstration of voluntary approaches for industrial environmental management in China ; activity 4, final report}, institution = {Wuppertal Institute for Climate, Environment and Energy}, address = {Wuppertal}, year = {2005}, language = {en} }