1. BLADE, 2019. BLADE Operating Standards and Flight Safety FAQs. Available from: https://blade.flyblade.com.
2. Cohen, A., Guan, J., Beamer, M., Dittoe, R., Mokhtarimousavi, S., 2020. Reimagining the Future of Transportation with Personal Flight: Preparing and Planning for Urban Air Mobility. UC Berkeley: Transportation Sustainability Research Center, Berkeley. Available from: https://escholarship.org/uc/item/9hs209r2.
3. EASA, 2019. Special Condition for small-category VTOL aircraft, SC-VTOL-01. Available from: https://easa.europe.eu.
4. Etherington, D., 2020. Volocopter and Grab to study the feasibility of deploying air taxi services in Southeast Asia, TechCrunch. Available from: https://techcrunch.com.
5. FAA, 2019. UAS Integration Pilot Program. Available from: https://www.faa.gov.