1. Shafiee S, Topal E (2009) When will fossil fuel reserves be diminished. Energy Policy 37:181–189
2. https://yearbook.enerdata.net/total-energy/world-consumption-statistics.html
3. https://www.enerdata.net/publications/world-energy-statistics-supply-and-demand.html
4. https://eneroutlook.enerdata.net/forecast-renewables-in-electricity-generation-share.html
5. Key World Energy Statistics (2013) International Energy Agency (IEA). Paris, France