1. Web link, http://www.tecc-project.eu
2. Web link, http://www.Alfa-Bird.eu-vri.eu
3. Web link, http://www.swafea.eu .
4. Web link, http://www.ecats-network.eu/aviation-environment/alternatives-fuels-engine-technology
5. Ministry of Defence, Defence Standard 91-91, Turbine Fuel, Aviation Kerosine Type, Jet A-1, Issue 6 (2008)