1. The impacts of Covid-19 crisis on global energy demand and CO2 emissions,2020
2. Richard G. Blunt, Philip Thomson, Olympe Bory-Baker McKenzie Report: The impact of covid19 on the oil and gas industry bakermckenzie.com/en/insight/publications/2020/04/the-impact-of-covid19-on-the-oil-and-gas-industry.
3. Matthew Farmer- Offshore Technology Article: How the Covid-19 coronavirus is affecting the offshore industry: https://www.offshore-technology.com/features/coronavirus-impact-offshore/.
4. Refinery Article on Wikipedia: https://en.wikipedia.org/wiki/Refinery.
5. University of Calgary-‘Energy education’ Article on Crude oil: https://energyeducation.ca/encyclopedia/Crude_oil.