1. Auer, J., 2004. Energy Prospects after the Petroleum Age. Deutsche Bank Research. Available from 〈http://www.dbresearch.de/PROD/DBR_INTERNET_EN-PROD/PROD0000000000181487.pdf〉 (accessed 1 May 2007).
2. Carbon dioxide emissions in a methane economy;Ausubel;Climate Change,1988
3. Accounting for growth: the role of physical work;Ayres;Structural Change and Economic Dynamics,2005
4. Energy efficiency. Sustainability and economic growth;Ayres;Energy,2007
5. Bentley, R.W., 2002. Oil forecasts, past and present In: International Workshop on Oil Depletion, Uppsala, Sweden, May 2002. Available from 〈http://www.peakoil.net/IWOOD2002/ppt/UppsalaRB.doc〉 (accessed 5 April 2007).