14.
Campbell SS, Zulley J. Napping in time-free environments. In: Dinges DF, Broughton RJ, editors. Sleep and alertness: chronobiological, behavioral, and medical aspects of napping. New York: Raven Press; 1989. pp. 121–38.
15.
Zulley J. Distribution of REM sleep in entrained 24 hour and free-running sleep-wake cycles. Sleep. 1980;2:377–89.PubMed
16.
Zulley J, Wever R, Aschoff J. The dependence of onset and duration of sleep on the circadian rhythm of rectal temperature. Pflügers Arch. 1981;391:314–8.
17.
Bryden G, Holdstock TL. Effects of night duty on sleep patterns of nurses. Psychophysiol. 1973;10:205–10.
18.
Webb WB, Agnew HW, Williams RL. Effects on sleep of a sleep period time displacement. Aerospace Med. 1971;42:152–5.
19.
Karacan I, Finley WW, Williams RL, Hursch CJ. Changes in stage 1-REM and stage 4 sleep during naps. Biol Psychiat. 1970;2:261–5.PubMed

Stay updated, free articles. Join our Telegram channel

Full access? Get Clinical Tree

