[2015-09-29]. ISBN 1-896522-83-1. (原始内容存档于2008-07-23). Gatland, Kenneth. Manned Spacecraft, Second Revision. New York, NY, USA: MacMillan Publishing Co., Inc. 1976:
Corporation. 2012 [2012-02-28]. (原始内容存档 (PDF)于2014-02-09). Spacecraft mass-to-orbit of up to 580 kg to LEO (28.5 deg, 185 km) Krebs, Gunter. Minotaur-1 (OSP-SLV)
was intended to pave the way for future commercial spaceflights. The spacecraft, SpaceShipOne, was launched by a carrier airplane taking off horizontally