1. EASA (2021), “Guidelines on design verification of UAS operated in the ‘specific’ category and classified in SAIL III and IV, Issue 1”, 31 March 2021.
2. European ATM Master Plan (2020), “Digitalising Europe’s Aviation Infrastructure”, SESAR Joint Undertaking, 2019.
3. Federal Aviation Administration (2012), “AC 150/5390-2C – Heliport Design”, U.S. Department of Transportation, 24 April.
4. Hamilton, B.A. (2018), “Urban Air Mobility (UAM) Market Study”.
5. ICAO Annex 14 o the Convention on International Civil Aviation, Aerodromes (2018), “Volume I, Aerodrome Design and Operations, Eighth Edition, International Standards and Recommended Practices”, International Civil Aviation Organization.