1. SESAR JU European Drones Outlook Study Unlocking the Value for Europe,2016
2. The High-Flying Industry: Urban Air Mobility Takes Off. Urban Air Mobility—An Industry Takes Off. Investments Are over 20 Times Higher than Four Years Ago;Hader,2020
3. SESAR JU European ATM Master Plan-Roadmap for the Safe Integration of Drones into All Classes of Airspace,2018
4. Drones for parcel and passenger transportation: A literature review
5. Ready for Take Off? Integrating Drones into the Transport System,2021