1. Bruner, S., Baber, S., Harris, C., Caldwell, N., Keding, P., Rahrig, K., Pho, L., and Wlezian, R. (2023, May 17). NASA N+3 Subsonic Fixed Wing Silent Efficient Low-Emissions Commercial Transport (SELECT) Vehicle Study Revision A, Available online: https://ntrs.nasa.gov/api/citations/20100042399/downloads/20100042399.pdf.
2. Collier, F., and Wahls, R. (2023, May 17). NASA Aeronautics Strategic Implementation Plan Strategic Thrust 3A Roadmap Overview Ultra-Efficient Commercial Vehicles-Subsonic Transports, Available online: https://nari.arc.nasa.gov/sites/default/files/attachments/Thrust%203a_1june2016-web.pdf.
3. International Civil Aviation Organization (ICAO) (2023, May 17). Electric and Hybrid Aircraft Platform for Innovation (E-HAPI). Available online: https://www.icao.int/environmental-protection/Pages/electric-aircraft.aspx.
4. Charles, A. (2020, July 16). Faradair Establishes Duxford HQ for Hybrid Electric STOL. Available online: https://www.ainonline.com/aviation-news/aerospace/2020-07-16/faradair-establishes-duxford-hq-hybrid-electric-stol.
5. Pullen, J. (2023, May 17). Raytheon Technologies Completes First Engine Run of Hybrid-Electric Demonstrator. Available online: https://www.aviationtoday.com/2023/01/04/raytheon-technologies-completes-first-engine-run-hybrid-electric-demonstrator/.