1. Droneii (2023, July 27). Global Drone Market Report 2022–2030. Available online: https://droneii.com/product/drone-market-report?nowprocket=1.
2. CORUS-XUAM Project (2023, December 11). U-Space ConOps and Architecture (Edition 4). Available online: https://sesarju.eu/sites/default/files/documents/reports/U-space%20CONOPS%204th%20edition.pdf.
3. Barrado, C., Boyero, M., Brucculeri, L., Ferrara, G., Hately, A., Hullah, P., Martin-Marrero, D., Pastor, E., Rushton, A.P., and Volkert, A. (2020). U-space concept of operations: A key enabler for opening airspace to emerging low-altitude operations. Aerospace, 7.
4. SESAR Joint Undertaking (2023, July 27). European Drones Outlook Study: Unlocking the Value for Europe. Available online: https://www.sesarju.eu/sites/default/files/documents/reports/European_Drones_Outlook_Study_2016.pdf.
5. European Commission (2022). Drone Strategy 2.0: Creating a Large-Scale European Drone Market, European Commission.