1. Worldometers, energy. Retrieved from: https://www.worldometers.info/ro/.
2. Gas turbines-major greenhouse gas inhibitors, global gas turbine news, in mechanical engineering magazine;Langston,2015
3. State of art of hydrogen usage as a fuel on aviation;Gizem Sürer;European Mechanical Science,2018
4. A review on potential use of hydrogen in aviation applications;Dincer;Int J Sustain Aviation,2016
5. Life cycle evaluation of hydrogen and other potential fuels for aircrafts;Bicer;Int J Hydrogen Energy,2017