1. Crutsinger, G.M., Short, J., Sollenberger, R.: The future of UAVs in ecology: an insider perspective from the Silicon Valley drone industry. J Unmanned Veh Syst 4(3), 161–168 (2016)
2. EASA: Concept of Operation for Drones: A Risk Based Approach to Regulation of Unmanned Aircraft. European Aviation Safety Agency (2015)
3. EASA: Introduction of a Regulatory Framework for the Operation of Drones, A-NPA 2015-10. European Aviation Safety Agency (2015)
4. EASA: Introduction of a Regulatory Framework for the Operation of Unmanned Aircraft, Technical Opinion. European Aviation Safety Agency (2015)
5. Dauer, J.C., Lorenz, S., Dittrich, J.S.: Automated Low Altitude Air Delivery. Deutscher Luft- und Raumfahrtkongress (2016)