1. The Case for Mars: The Plan to Settle the Red Planet and Why We Must;Zubrin,1996
2. Terraforming Mars: a review of research;Fogg;J. Br. Interplanet. Soc.,1995
3. The science of extraterrestrial habitats and their human exploration;Cockell;Astrobiology,2001
4. The benefits of a permanent backup planet for humanity;Baum;J. Existential Risk Anal.,2008
5. Out of This World: The New Field of Space Architecture;Sherwood,2009