1. EIA Annual Energy Review (2008)
http://www.eia.doe.gov/aer/pdf/aer.pdf
. Accessed 7 Jul 2010
2. Eurostat (2009) Statistical aspects of the energy economy in 2008, issue number 55/2009.
http://epp.eurostat.ec.europa.eu/cache/ITY_OFFPUB/KS-SF-09-055/EN/KS-SF-09-055-EN.PDF
. Accessed 7 Jul 2010
3. Simonetti D, Dumesic JA (2008) Catalytic strategies for changing the energy content and achieving C–C coupling in biomass-derived oxygenated hydrocarbons. ChemSusChem 1:725–733
4. Energy Information Administration, International Energy Outlook (2009)
http://www.eia.doe.gov/oiaf/ieo/pdf/0484%282009%29.pdf
. Accessed 7 Jul 2010
5. BP (2009) Statistical review of world energy.
http://bp.com/statisticalreview
. Accessed 7 Jul 2010