Bioalcohols ("Propanol is the forgotten alcohol fuel, but for good reason. Propanol is the most difficult and expensive alcohol to produce.") biofuel.org.uk. 2010. Arkistoitu 16.4.2014. Viitattu 23.4.2014. (englanniksi)
Shwartz, Mark: Stanford scientists discover a novel way to make ethanol without corn or other plants ("In the experiment, Kanan and Li found that a slightly altered oxide-derived copper catalyst produced propanol with 10 percent efficiency. The team is working to improve the yield for propanol by further tuning the catalyst's structure.") The Stanford News Service. 9.4.2014. Stanford, Kalifornia: Stanford University. Viitattu 23.4.2014. (englanniksi)
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Bioalcohols ("Propanol is the forgotten alcohol fuel, but for good reason. Propanol is the most difficult and expensive alcohol to produce.") biofuel.org.uk. 2010. Arkistoitu 16.4.2014. Viitattu 23.4.2014. (englanniksi)