1. Integration of civil unmanned aircraft systems (UAS) into the national airspace system (NAS) roadmap,2018
2. Integration of civil unmanned aircraft systems (UAS) into the national airspace system (NAS) roadmap,2020
3. Air traffic management for low-altitude drones,2015
4. Unmanned aircraft system traffic management (UTM) concept of operations[C]∥16th AIAA Aviation Technology, Integration, and Operations Conference;Kopardekar,2016
5. Federal Aviation Administration. UTM ConOps v2.0. 202-03.