1. Technology Roadmap, Hydrogen and Fuel Cells, International Energy Agency, 2015.
2. Hydrogen and Fuel Cells: Opportunities for Growth – A roadmap for the UK; David Hart, Jo Howes, Ben Madden, Edward Boyd, November 2016.
3. Development of highly efficient planar solid oxide fuel cells; Kazuhiko Nozawa, Himeko Orui, Takeshi Komatsu, Reiichi Chiba and Hajime Arai, Special feature: NTT technologies for the environment.
4. Solid Oxide Fuel Cell (SOFC) technology for greener airplanes; Larry Chick, Mike Rinker; Energy Materials Group, Pacific Northwest National Laboratory, September 2010.
5. https://en.wikipedia.org/wiki/Environmental_impact_of_aviation