1. Achieving human presence in space exploration;Lester;Fall,2013
2. NASA, “NASA's journey to mars pioneering next steps in space exploration,” 2015. [Online]. Available: http://www.nasa.gov/sites/default/files/atoms/files/journey-to-mars-next-steps-20151008_508.pdf.
3. NASA's Journey to Mars;Daines,2020
4. B. Dunbar, “Moon to mars overview,” February 2019. [Online]. Available: https://ww.nasa.gov/topics/moon-to-mars/overview.
5. Surgery in space: where are we at now?;Drudi;Acta Astronaut.,2012