[1]  http://www.googlelunarxprize.org/

[2]  Spacecraft Power SystemsBy Mukund R. Patel. Published 2005 CRC Press.

[3]  Burke, Kenneth A., 2003A, “Fuel Cells for Space Science Applications,” NASA TM-2003-212730.

[4] http://marsrover.nasa.gov/technology

[5] http://www.esa.int/esaCP/ESA2CKS162D_FeatureWeek_2.html

[6] http://en.wikipedia.org/wiki/Moon

[7] Larson, Wertz. Space Mission Analysis and Design. Published 1999 Springer.

[8] Lunar Reconnaissance Orbiter Overview:The Instrument Suite and Mission, various authors. Published 2007 Springer.

[9] http://www.spacex.com/