Roger D Launius, Conway, Erik M, Johnston, Andrew K, Wang, Zse Chien , Hersch, Matthew H, Paikowsky, Deganit , Whalen, David J, Toldi, Eric , Dougherty, Kerrie , Hays, Peter L, and others, . 2012. ?Spaceflight: The Development Of Science, Surveillance, And Commerce In Space?. Proceedings Of The Ieee, 100, 13, Pp. 1785?1818.