1. National Research Council. Continuing Kepler’s Quest: Assessing Air Force Space Command’s Astrodynamics Standards. National Academies Press, 2012
2. Liou, J.-C.: USA Space Debris Environment, Operations, and Research Updates. Committee on the Peaceful Uses of Outer Space. 29 January–9 February 2018, Vienna.
https://web.archive.org/web/20190221155650030
.
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20180001749.pdf
. Accessed 21 Feb 2019
3. Okada, M., et al. Maximizing post mission disposal of mega constellations satellites reaching end of operational lifetime. In: ESA 7th European Conference on Space Debris, ESOC, Germany: (2017)
4. https://web.archive.org/web/20180531135145
.
https://gdmissionsystems.com/Articles/2016/04/07/news-release-4-7-2016-gd-completes-u-s-air-force-space-fence-radar-array-ground-structure
. Accessed 31 May 2018
5. Flohrer, T., et al. Operational collision avoidance at ESOC. In: Deutscher Luft-und Raumfahrtkongress, Rostok, Germany: (2015)