Bushnell, Dennis M. and Moses, Robert W. (2016). Fresh Thinking about Mars. Aerospace America, pp.34-39 (March). Casler, James. Associate Professor, Department of Space Studies, University of North Dakota. Interviewed by Jack Stuster concerning Mars exploration on 22 February 2016. Clancey, William (2004). Automating CAPCOM: Pragmatic Operations and Technology Research for Human Exploration of Mars. In, Martian Expedition Planning, Charles S. Cockell (Ed.), San Diego, CA: American Astronautical Society Volume 107, Science and Technology Series pp.411-430; Proceedings of the Martian Expedition Planning Symposium of the British Interplanetary Society, London, 24 February 2003. Cockell, Charles S.; Braham, Stephen; Clancey, Bill; Lee, Pascal; and Lim, Darlene (2004). Exobiological Protocol and Laboratory for the Human Exploration of Mars--Lessons from a Polar Impact Crater. In, Martian Expedition Planning, Charles S. Cockell (Ed.), San Diego, CA: American Astronautical Society Volume 107, Science and Technology Series pp.33-52; Proceedings of the Martian Expedition Planning Symposium of the British Interplanetary Society, London, 24 February 2003. Cohen, Marc (1996). First Mars Outpost Habitation Strategy. In Strategies for Mars: A Guide to Human Exploration. Carol R. Stoker and Carter Emmart (Eds.), San Diego, CA: American Astronautical Society Volume 86, Science and Technology Series pp.465-512. de León , Pablo. Associate Professor, Department of Space Studies, University of North Dakota. Interviewed by Jack Stuster concerning hybrid space suit design for Mars on 22 February 2016. Drake, Bret (Editor) (2009). Human Exploration of Mars Design Reference Architecture 5.0. NASA/SP– 2009–566. Washington, DC: NASA Headquarters (July). http://www.nasa.gov/pdf/373665main_NASA-SP-2009-566.pdf Drake, Bret (Editor) (2009). Human Exploration of Mars Design Reference Architecture 5.0 Addendum. NASA/SP–2009–566-ADD. Washington, DC: NASA Headquarters (July). Gaffey, Mike. Chester Fritz Distinguished Professor, Department of Space Studies, University of North Dakota. Interviewed by Jack Stuster concerning geological field work on Mars on 22 February 2016. Gjestvang, Robert (2002). Mars Deployable Greenhouse Preliminary Design Report. Boulder: University of Colorado Department of Aerospace Engineering Sciences (March). Godwin, Felix (1960). The Exploration of the Solar System. New York: Plenum Press, Inc. Himmel, S. C., Dugan, J. F., Luidens, R. W. and Weber, R. J. A Study of Manned Nuclear-Rocket Missions to Mars. IAS Paper No. 61-49. Paper presented at the 29th Annual Meeting of the Institute of Aerospace Sciences in New York City, 23-25 January 1961. Hoffman, Stephen J. and Kaplan, David I. Editors (1997). Human Exploration of Mars: The Reference Mission of the NASA Mars Exploration Study Team. NASA Special Publication 6107, Houston, TX: Johnson Space Center (July). Hoffman, Stephen J. (2001). The Mars Surface Reference Mission: A Description of Human and Robotic Surface Activities. NASA/TP—2001–209371, Houston, TX: Johnson Space Center (December). McKay, Christopher P. (2004). Scientific Goals for Martian expeditions. In, Martian Expedition Planning, Charles S. Cockell (Ed.), San Diego, CA: American Astronautical Society Volume 107, Science and Technology Series pp.25-32; Proceedings of the Martian Expedition Planning Symposium of the British Interplanetary Society, London, 24 February 2003. NASA Exploration Team Human Subsystem Working Group (2002). Guidelines and Capabilities for Designing Human Missions, Johnson Space Center. Nelson, Travis. Graduate Assistant, Department of Space Studies, University of North Dakota. Interviewed by Jack Stuster concerning simulated advanced space suit operations on Mars on 22 February 2016.