1. Space surveillance network, Chapter 19, Space Primer: Air Command and Staff College Space Research Seminars;Chatters,2009
2. Colocation Strategy and Collision Avoidance for the Geostationary Satellites at 19 degrees West, M.C. Eckstein, C.K. Rajasingh, P. Blumer, presented at the CNES international symposium on Space Dynamics, Toulouse (France), 6–10 November 1989.
3. Cosmic Study on Space Traffic Management, report published in 2006 by the International Academy of Astronautics (IAA).
4. Declaration of Preparatory Space Surveillance Programme, ESA/Program Board-SSA (2010)29.
5. ISON Worldwide Scientific Optical Network, I. Molotov et al., 5th European Conference on Space Debris, Darmstadt (Germany), 30 March–2 April 2009.