1. WielandPO. Living in Space: The Design and Operation of the Life Support Systems on the International Space Station, vol. 1. TM-1998-206956. MSFC: Alabama, 1998.
2. WielandPO. Living in Space: The Design and Operation of the Life Support Systems on the International Space Station, vol. 2. TM-1998-206956. MSFC: Alabama, 1998.
3. NicogossianA, ParkerJ. Space Physiology and Medicine, NASA SP-447. U.S. Government Printing Office, Washington, DC, 1982.
4. LimeroTF, GalenT, JamesJT. In: EPA/Air and Water Management Association International Symposium. Raleigh, NC: EPA, Report Number EPA/600/9-90/026, 1990, pp. 780–788.