1. Leone, D.: DARPA Selects contractors for phoenix satellite servicing program. Space News.
http://spacenews.com/darpa-selects-contractors-phoenix-satellite-servicing-program/
(2012)
2. Pelton, J.N.: New Solutions to the Orbital Debris Problem, Chapter 2. Springer, Basel (2014)
3. Industry Partners Help Establish Consortium for Satellite Servicing Standards.
https://mail.aol.com/webmail-std/en-us/suite
(2018)
4. Caleb, H.: DARPA revamps Phoenix in-orbit servicing program. Via Satellite.
https://www.satellitetoday.com/government-military/2015/06/02/darpa-revamps-phoenix-in-orbit-servicing-program/
(2015)
5. Global Satellite Servicing Forum.
https://mail.aol.com/webmail-std/en-us/suite
(2018)