1. DNV: Energy transition outlook 2021 - A global and regional forecast to 2050.
2. Shipping Zero Emission Project: Roadmap to Zero Emission from International Shipping | March 2020
3. BP Energy Outlook 2020 edition
4. Laiminger, S., Url, M., Schneider, M., Payrhuber, K.: Hydrogen as Future Fuel for Gas, CIMAC World Congress 2019, paper no. 054
5. CES (MWM). https://www.mwm.net/kompetenzen-dezentraler-energieversorgung/gas-loesungen/wasserstoffhaltige-gase/