1
European Commission. Flightpath 2050 Europe’s Vision for Aviation. 2011.https://ec.europa.eu/transport/sites/transport/files/modes/air/doc/flightpath2050.pdf
2
Strategic Research & Innovation Agenda 2017 Update. 2017;1.https://www.acare4europe.org/sites/acare4europe.org/files/document/ACARE-Strategic-Research-Innovation-Volume-1.pdf
3
Aerospace Technology Institute. Raising Ambition, Technology Strategy and Portfolio Update 2016. 2016.https://www.ati.org.uk/wp-content/uploads/2017/10/Raising-Ambition-ATI-Technology-Strategy-Portfolio-Update-2016.pdf
4
Clean Sky 2. Clean Sky 2 Joint Undertaking Development Plan. http://www.cleansky.eu/sites/default/files/inline-files/51.%20CS2DP%20December%202017.pdf
5
NASA. NASA Technology Roadmaps TA15 Aeronautics. 2015.https://www.nasa.gov/sites/default/files/atoms/files/2015_nasa_technology_roadmaps_ta_15_aeronautics_final.pdf
6
NASA. NASA Aeronautics Strategic Implementation Plan. 2017.https://www.nasa.gov/sites/default/files/atoms/files/sip-2017-03-23-17-high.pdf
