1. Airway (2021), “Boeing 737 MAX close to returning to fly in Europe”, available at: www.airway1.com/boeing-737-max-close-to-returning-to-fly-in-europe/
2. Alves, E., Bhatt, D., Hall, B., Driscoll, K. and Murugesan, A. (2018), “Considerations in Assuring Safety of Increasingly Autonomous Systems”, Final Technical Report for NASA Project, NASA Contract: NNL16AA06B.
3. Levels of aviation autonomy,2018
4. Brady, C. (2019), “737 MAX FCC redesign”, available at: www.b737.org.uk/maxfccissue.htm