Age-related changes of circadian rhythms and sleep-wake cycles.
J Am Geriatr Soc. 2003 Aug 1;51(8):1085-91.
Sleep in the Intensive Care Unit.
Am. J. Respir. Crit. Care Med. 2015 Apr 1; 191 (7): 731-8.
Temporal disorganization of circadian rhythmicity and sleep-wake regulation in mechanically ventilated patients receiving continuous intravenous sedation.
Sleep. 2012 Aug 1;35(8):1105-14.