1. U.S. Department of Defense, (DoD). Establishment of unidentified aerial phenomena task force. https://www.defense.gov/News/Releases/Release/Article/2314065/establishment-of-unidentified-aerial-phenomena-task-force/ (2020).
2. U.S. Department of Defense, (DoD). DoD announces the establishment of the airborne object identification and management synchronization group (AOIMSG). https://www.defense.gov/News/Releases/Release/Article/2853121/dod-announces-the-establishment-of-the-airborne-object-identification-and-manag/ (2021).
3. U.S. Department of Defense, (DoD). DoD announces the establishment of the all-domain anomaly resolution office. https://www.defense.gov/News/Releases/Release/Article/3100053/dod-announces-the-establishment-of-the-all-domain-anomaly-resolution-office/ (2022).
4. Office of the Director of National Intelligence, (DNI). Preliminary assessment: Unidentified aerial phenomena. https://www.dni.gov/files/ODNI/documents/assessments/Prelimary-Assessment-UAP-20210625.pdf (2021).
5. Hynek, J. A. The Hynek UFO Report (Barnes and Noble Books, 1997).