1. NLR - Royal Netherlands Aerospace Centre, SEO Amsterdam Economics, Destination 2050-A route to net zero European aviation, 2021.
2. Nationaler Wasserstoffrat, Stellungnahme: Wasserstoff für die Luftfahrt in Deutschland, 2021.
3. Greening commercial air transportation by using liquid hydrogen (LH2) as a fuel;Janić;Int J Hydrogen Energy,2014
4. Airports Council International, Aerospace Technology Institute, Integration of Hydrogen Aircraft into the Air Transport System, 2021.
5. Clean Sky 2 JU, FCH 2 JU, Hydrogen-powered aviation: A fact-based study of hydrogen technology, economics, and climate impact by 2050, 2020. https://doi.org/10.2843/766989.