- Glaeser, E.L., Kallal, H.D., Scheinkman, J.A., Shleifer, A., 1992. Growth in cities. J. Polit. Econ. 100, 1126–1152. https://doi.org/10.1086/261856.
- Youn, H., Bettencourt, L.M.A., Lobo, J., et al., 2016. Scaling and universality in urban economic diversification. J R Soc Interface 13, 20150937. https://doi.org/10.1098/ rsif.2015.0937.
- Thipphavong, D.P., Apaza, R., Barmore, B., et al., 2018. Urban air mobility airspace integration concepts and considerations. In: 2018 Aviation Technology, Integration, and Operations Conference. American Institute of Aeronautics and Astronautics.
- Pons-Prats, J., Zivojinovi ˇ ´c, T., Kuljanin, J., 2022. On the understanding of the current status of urban air mobility development and its future prospects: commuting in a flying vehicle as a new paradigm. Transp Res Part E Logist Transp Rev 166, 102868. https://doi.org/10.1016/j.tre.2022.102868.
- Uber Elevate, “Fast-Forwarding to a Future of On-Demand Urban Air Transportation,” (2016), https://evtol.news/news/uber-elevate-white-paper-oct-2016.
- S. Shaheen, A. Cohen, and E. Farrar, Te Potential Societal Barriers of Urban Air Mobility (UAM) (Berkeley, CA: Transportation Sustainability Research Center, 2018).
- European Union Aviation Safety Agency (EASA), “Study on the Societal Acceptance of Urban Air Mobility in Europe,” (2021), https://www.easa.europa.eu/en/full-report-studysocietal-acceptance-urban-air-mobility-europe
- P. Planing and Y. Pinar, “Acceptance of Air Taxis-A Field Study During the First Flight of an Air Taxi in a European City,” (2019), https://osf.io/rqgpc.
- M. Fu, R. Rothfeld, and C. Antoniou, “Exploring Preferences for Transportation Modes in an Urban Air Mobility Environment: Munich Case Study,” Transportation Research Record: Journal of the Transportation Research Board 2673, no. 10 (2019): 427–442, https://doi.org/10.1177/ 0361198119843858
- Lilium, 2022. Helity and Lilium Join Forces to Bring High Speed Electric Air Mobility to Southern Spain - Lilium. https://lilium.com/newsroom-detail/helity-lilium-developnetwork-andalusia. (Accessed 23 May 2023).
- Volocopter, 2021b. Urban air mobility: atlantia, aeroporti di Roma, and volocopter to bring electric air taxis to Italy. In: Volocopter. https://www.volocopter.com/ne wsroom/atlantia-aeroportodiroma-volocopter-bring-airtaxis-to-italy/. (Accessed 23 May 2023).
- SEA, 2022. Urban Air Mobility: the City Is Getting Closer | SEA Corporate. https://seami lano.eu/en/urban-air-mobility. (Accessed 23 May 2023).
- Aviation, Joby, 2022. ANA Holdings and Joby Partner to Bring Air Taxi Service to Japan | Joby. https://www.jobyaviation.com/news/ana-holdings-and-joby-partner-bri ng-air-taxi-service-to-japan/. (Accessed 23 May 2023).
