1. Unpacking the three C's: congested, competitive, and contested space;Harrison;Astropolitics,2013
2. A new US-Sino space relationship: moving toward cooperation;Johnson-Freese;Astropolitics,2006
3. Space Warfare in the 21st Century: Arming the Heavens;Johnson-Freese,2017
4. Foreign Ministers Take Decisions to Adapt NATO, Recognize Space as an Operational Domain,2019
5. On war in space;Kleinberg;Astropolitics,2007