1. Energy Use in Production: A Long-term Analysis;Buenstorf,2002
2. Why Economists Disagree: The Political Economy of Economics;Cole,1991
3. Towards an ecological economics of sustainability;Common;Journal of Ecological Economics,1992
4. The value of the world's ecosystem services and natural capital;Costanza;Nature,1997
5. Nature's Services: Societal Dependence on Natural Ecosystems;Daily,1997