1. "Life cycle assessment of fuel ethanolfrom sugarcane in Argentina", Int. J;Amores;Life Cycle Assess,2013
2. Arndt, C., K. Pauw and J. Thurlow. 2015. "The economy-wide impacts and risks of Malawi's farminput subsidy program", Am. J. Agric. Econ. 98(3): 962-980.
3. Barros, S. 2016. "Brazil Biofuels Annual Report 2016". USDA: Washington, DC, USA., in https://apps.fas.usda.gov/newgainapi/api/report/downloadreportbyfilename?filename=Biofuels%20Annual_Sao%20Paulo%20ATO_Brazil_8-12-2016.pdf
4. BP Global Group. 2013. "Statistical Review of World Energy", Energy Outlook, in http://www.bp.com/en/global/corporate/energy-economics/energy-outlook.html
5. BP. 2018. "Statistical Review of World Energy-all data 1965-2018", Global Insights,https://www.bp.com/en/global/corporate/energy-economics/statistical-review-of-world-energy/country-and-regional-insights/global.html