Campbell, S. S. Max Planck Institute of Psychiatry, Max Planck Society;
Dawson, D. Max Planck Institute of Psychiatry, Max Planck Society;
Zulley, J. Max Planck Institute of Psychiatry, Max Planck Society;
Campbell, S. S., Dawson, D., & Zulley, J. (1993). When the human circadian system is caught napping: Evidence for endogenous rhythms close to 24 hours. Sleep, 16, 638-640.