1. Anon.: Flightpath 2050: Europe’s vision for aviation. Maintaining global leadership and serving society’s needs, European Commission, Luxembourg: Publications Office of the European Union, 2011
2. Anon.: Transport trends 2009 edition, Department for Transport, London, 2010
3. Anon.: WHITE PAPER: Roadmap to a single European transport area—towards a competitive and resource efficient transport system, European Commission, Brussels, 2011
4. Bulthoff, H.H., Nieuwenhuizen, F.M., Padfield, G.D.: MyCopter: enabling technologies for personal air transport systems. In: RAeS Rotorcraft conference: the future Rotorcraft—enabling capability through the application of technology, pp. 1–11. The Royal Aeronautical Society, London (2011)
5. Sweeney Jr., E.: Aerocar 2000. In: AIAA and SAE World aviation conference, Society of Automotive Engineers International, 1998. doi: 10.4271/985515