1. The prospects for natural gas as a transport fuel in Europe;Le Fevre,2014
2. Eurostat. Energy, transport and environment statistics: 2019 edition. Luxemburg: Publications Office of the European Union; 2019. doi:10.2785/660147.
3. The role of gas in today’s energy transitions;IEA;International Energy Agency Publications,2019
4. Natural gas: A transition fuel for sustainable energy system transformation?;Safari;Energy Sci Eng,2019
5. VW brand to halt combustion engine development;Manthey;Electrive.com,2021