1. S. Hoffman, D. Kaplan (Eds.), The Reference Mission of the NASA Mars Exploration Study Team, NASA SP-6017, Johnson Space Center, Houston, Texas, 1997.
2. B.G. Drake (Ed.), Reference mission version 3: addendum to the human exploration of Mars, NASA SP-6017-ADD, Johnson Space Center, Houston, Texas, 1998.
3. Draper/MIT CE&R Study, Final Report, Cambridge, MA, September 2005.
4. J. Connolly, K. Joosten, Human Mars exploration mission architectures and technologies, NASA, Houston, January 2005.
5. R. Zubrin et al., Mars direct: a simple, robust, and cost effective architecture for the space exploration initiative, AIAA-1991-329-394.