1. Winget, C. M., DeRoshia, C. W., Markley, C. L. & Holley, D. C. Aviat. Space envir. Med. 55, 1085–1096 (1984).
2. Comperatore, C. A. & Krueger, G. P. Occupational Medicine: State of the Art Review Vol. 5, 323–341 (1990).
3. Wright, J. E. et al. Aviat. Space envir. Med. 54, 132–137 (1983).
4. Sasaki, T. in Chronobiology: Principles and Applications to Shifts in Schedules (eds Scheving, L. E. & Halberg, F.) 417–431 (Sijthoff & Noordhoff, Alphen aan den Rijn, Netherlands, 1980).
5. Antal, L. C. Br. J. Sports Med. 9, 9–12 (1975).