1. European Environment Agency: Greenhouse gas emissions from transport.
https://www.eea.europa.eu/data-and-maps/indicators/transport-emissions-of-greenhouse-gases/transport-emissions-of-greenhouse-gases-11
2. Musk, E.: Hyperloop Alpha (2013).
http://www.spacex.com/sites/spacex/files/hyperloopalpha-20130812.pdf
3. Chesteron, V., Kelvin, D.: Hyperloop-Opportunity For UK Supply Chain (2018). Final report.
https://s3-eu-west-1.amazonaws.com/media.ts.catapult/wp-content/uploads/2018/10/08153525/00601_Hyperloop-Report.pdf
4. Hyperllop One.
https://hyperloop-one.com/global-challenge
5. Hardt: European Hyperloop Program (2018).
https://ec.europa.eu/eipp/desktop/en/projects/project-print-9401.html