Zeitzer, J. M., Duffy, J. F., Lockley, S. W., Dijk, D., & Czeisler, C. A. (2007). Plasma Melatonin Rhythms In Young and Older Humans During Sleep, Sleep Deprivation, and Wake. Associated Professional Sleep Societies, LLC.

Zeitzer, Jamie M., Jeanne F. Duffy, Steven W. Lockley, Derk-Jan Dijk, och Charles A. Czeisler. Plasma Melatonin Rhythms In Young and Older Humans During Sleep, Sleep Deprivation, and Wake. Associated Professional Sleep Societies, LLC, 2007.

Zeitzer, Jamie M., et al. Plasma Melatonin Rhythms In Young and Older Humans During Sleep, Sleep Deprivation, and Wake. Associated Professional Sleep Societies, LLC, 2007.