1. DOC (Department of Commerce), 2008. How does Commerce Define Sustainable Manufacturing? http://www.trade.gov/competitiveness/sustainablemanufacturing/how_doc_ defines_SM.asp.
2. A framework for social life cycle impact assessment;Dreyer;Int. J. Life Cycle Assess.,2006
3. EEA (European Environmental Agency) CSI, 2005. EEA Core Set of Indicators, EEA Technical Report No. 1/2005.
4. EPfI (Environmental Performance Indicators), 2010. 2010 Environmental Performance Indicators, Yale Center for Environmental Law & Policy/Center for International Earth Science Information Network In Collaboration with World Economic Forum/Joint Research Centre of the European Commission, http://epi.yale.edu/file_columns/0000/0008/epi-2010.pdf.
5. ESI (Environmental Sustainability Indicators), 2005. 2005 Environmental Sustainability Index: Benchmarking National Environmental Stewardship, Yale Center for Environmental Law and Policy/Center for International Earth Science Information Network, http://www.yale.edu/esi/ESI2005.pdf.