1. BP Statistical Review of World Energy
https://www.bp.com/content/dam/bp/business-sites/en/global/corporate/pdfs/energy-economics/statistical-review/bp-stats-review-2019-full-report.pdf
2. ExxonMobil, Outlook for Energy 2019: A Perspective to 2040
https://corporate.exxonmobil.com/-/media/Global/Files/outlook-for-energy/2019-Outlook-for-Energy_v4.pdf
3. Be Future Forward, Honeywell UOP
https://www.digitalrefining.com/article_1002373.pdf
4. Fuels and Fuel-Additives;Srivastava,2014
5. European Parliament, 2018, Directive of the European Parliament and of the Council cast, 2016/0382 (COD)
http://data.consilium.europa.eu/doc/document/PE-48-2018-INIT/en/pdf