1. Akerstedt, T., Torsvall, L., Gillberg, M., 1985, ‘Sleepiness: continuous EEG and EOG measures in the field and laboratory’, in the Proceedings of the workshop Electro-encephalography in transport operations, Cologne 15–17 sept. 1985, 1–13.
2. Baker, C. H., 1959, ‘Attention to visual displays during a vigilance task: II. Maintaining the level of vigilance’, Brit. J. Psycho., 50, 30–36.
3. Baker, C. H., 1960, ‘Maintaining the level of vigilance by means of artificial signals’, J. Appl. Psycho., 44, 336–338.
4. Beatty, J., Ahern, S. K., Katz, R., 1977, ‘Sleep deprivation and the vigilance of anesthesiologists during simulated surgery’, Vigilance. New York: Plenum Press, ch. 23, 511–535.
5. Berch, D. B., Kanter, D. R., 1984, ‘Individual differences’, in J. S. Warm (ed) Sustained attention in human performance. Chichester: John Willey & Sons, ch. 5, 143–170.