Thoma, K.; Wicklein, M.; Schneider, E., New Protection Concepts for Meteoroid / Debris Shields, Proceedings of the 4th European Conference on Space Debris (ESA SP-587), D. Danesy (editor), 2005-08, p. 445. 18–20 April 2005 in Darmstadt, Germany. AbstractArchiviato il 9 aprile 2008 in Internet Archive..
Thoma, K.; Wicklein, M.; Schneider, E., New Protection Concepts for Meteoroid / Debris Shields, Proceedings of the 4th European Conference on Space Debris (ESA SP-587), D. Danesy (editor), 2005-08, p. 445. 18–20 April 2005 in Darmstadt, Germany. AbstractArchiviato il 9 aprile 2008 in Internet Archive..
H. Grant Stokes, Curt von Braun, Ramaswamy Sridharan, David Harrison, e Jayant Sharma, The Space-Based Visible Program, su ll.mit.edu, MIT Lincoln Laboratory (archiviato dall'url originale il 27 marzo 2008).