1. Apollo Unmanned Missions, Online at 〈http://www-pao.ksc.nasa.gov/history/apollo/apollosat-unmanned.htm〉.
2. GWB Mandate for Space Exploration, January 2004, Online at 〈http://www.nasa.gov/pdf/55584main_vision_space_exploration-hi-res.pdf〉.
3. Results of the Lunar Architecture Team (LAT) phase 1 study, Online at Windchill Folder Display: Constellation Linked Documents > /Cx Public Released Docs.
4. M.M. Connors, D.B. Eppler, D.G. Morrow, Interviews with the Apollo Lunar Surface Astronauts in Support of Planning for EVA Systems Design, NASA TM 108846, Ames Research Center, CA, September, 1994.
5. Biomedical Results of Apollo, NASA SP-368, Washington, DC, 1975.