1. European Aviation Safety Agency (EASA)
, 2016, “European Aviation Environmental Report,” http://www.easa.europa.eu/eaer/, Accessed September 30, 2017.
2. Advisory Council for Aeronautics Research in Europe (ACARE)
, 2017, “Strategic Research and Innovation Agenda,” Executive Summary. http://www.acare4europe.org/, Accessed September 30, 2017.
3. European Union
, 2017, “Clean Sky 2,” http://www.cleansky.eu/, Accessed May 31, 2017.
4. Value Improvement Through a Virtual Aeronautical Collaborative Enterprise (VIVACE)
, 2011, “Final Report Summary.” http://cordis.europa.eu/result/rcn/47814, Accessed May 31, 2017.
5. More Open Electrical Technologies (MOET)
, 2011, “Project Details.” http://cordis.europa.eu/project/rcn/81472l, Accessed May 31, 2017.