1. European Union leadership in biofuels regulation: Europe as a normative power?;Afionis;Journal of Cleaner Production,2012
2. Batista, Edgard Antunes Dias (2012) After all, is Ethanol Positive or Negative? U FORES Publication.
3. Bonsucro (2011) Better Sugarcane Initiative. Available at: 〈http://www.bonsucro.com/〉
4. Börjesson, Pål, Ericsson, Karin, Di Lucia, Lorenzo, Nilsson, Lars J., Åhman, Max. (2009) Sustainable vehicle fuels—do they exist? Available at: 〈http://lup.lub.lu.se/record/1360645/file/1366749.pdf〉.
5. BP (2012) Interview with Biofuel Trader.