1. NASA. Journey to Mars: Pioneering Next Steps in Space Exploration. NASA, NP-2015-08-2018-HQ. https://www.nasa.gov/sites/default/files/atoms/files/journey-to-mars-next-steps-20151008_508.pdf (2015).
2. National Academy Of Sciences. A Strategy for Research in Space Biology and Medicine in the New Century. in Committee on Space Biology and Medicine Space Studies Board (ed.) (National Academies Press, 1998).
3. National Academy Of Sciences. Recapturing a Future for Space Exploration: Life and Physical Sciences Research for a New Era. in Committee for the Decadal Survey on Biological and Physical Sciences in Space (ed.) (National Academies Press, 2011).
4. NASA. NASA strategic plan. NASA, NP-2014-01-964-HQ (2014).
5. NationalAcademyOfSciences. Life and Physical Sciences Research for a New Era of Space Exploration: An Interim Report. in Committee for the Decadal Survey on Biological and Physical Sciences in Space (ed.) (National Academies Press, 2010).