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Valentine, Theresa; Amde, Lishan (November 9, 2006). "Magnetic Fields and Mars". Mars Global Surveyor @ NASA. Archived from the original on September 14, 2012. Retrieved July 17, 2009.
"Overview of Greenhouse Gases". epa.gov. United States Government EPA. December 23, 2015. Archived from the original on August 12, 2016. Retrieved October 24, 2016.
"NIAC 2014 Phase 1 Selections". NASA Innovative Advanced Concepts (NIAC). June 5, 2014. Archived from the original on March 30, 2015. Retrieved May 18, 2015.
Franz, Heather B.; Trainer, Melissa G.; Malespin, Charles A.; Mahaffy, Paul R.; Atreya, Sushil K.; Becker, Richard H.; Benna, Mehdi; Conrad, Pamela G.; Eigenbrode, Jennifer L. (April 1, 2017). "Initial SAM calibration gas experiments on Mars: Quadrupole mass spectrometer results and implications". Planetary and Space Science. 138: 44–54. Bibcode:2017P&SS..138...44F. doi:10.1016/j.pss.2017.01.014. ISSN0032-0633.