1. EIA Annual Energy Review, 2009, http://www.eia.doe.gov/aer/pdf/aer.pdf, accessed September 2010
2. Eurostat , Statistical Aspects of the Energy Economy, 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 September 2010
3. Catalytic Strategies for Changing the Energy Content and Achieving CC Coupling in Biomass-Derived Oxygenated Hydrocarbons
4. Energy Information Administration, International Energy Outlook, 2009, http://www.eia.doe.gov/oiaf/ieo/pdf/0484%282009%29.pdf, accessed September 2010
5. EIA International Energy Outlook, 2010, www.eia.doe.gov/oiaf/ieo, accessed September 2010