1. Environmental sustainability: universal and non-negotiable;Goodland;Ecol Appl,1996
2. Our common future,1987
3. The limits to growth;Meadows,1972
4. The concept of sustainable economic development;Barbier;Environ Conserv,1987
5. USDA, 2007. Sustainable agriculture: definitions and terms. Special Reference Brief no. SRB 99-02., Mary V. Gold, ed. Available at: http://www.nal.usda.gov/afsic/pubs/terms/srb9902.shtml.