1. FAA (2011). FAA and Industry are taking action to address pilot fatigue, but more information on pilot commuting is needed. Office of Inspector General Audit Report No. AV-2011-176, September 2011.
2. Comperatore, CA, & Krueger, GP. (1990) Circadian rhythm desynchronosis, jet lag, shift lag, and coping strategies. US Army Aeromedical Research Laboratory Report No 90-14.
3. Battelle Memorial Institute (1998): An overview of the scientific literature concerning fatigue, sleep, and the circadian cycle. Report to the Office of the Chief Scientific and Technical Advisor for Human Factors, FAA. http://cf.alpa.org/internet/projects/ftdt/backgr/batelle.htm.