多相睡眠
com/clock/2006/10/what_is_a_natural_sleep_patter.php 2007年12月29日閲覧. "Includes image: the original data from Wehr's experiment."
↑ A. Roger Ekirch (2005), At Day's Close: Night In Times Past, pp. 308-310 ISBN 0-393-05089-0
↑ Frances Quarles (London 1644), Enchirdion ch. 54
↑ A. Roger Ekirch (2005), At Day's Close: Night In Times Past, pp. 311-323 ISBN 0-393-05089-0
↑ A. Roger Ekirch (2005), At Day's Close: Night In Times Past, pp. 301-302 ISBN 0-393-05089-0
↑ Lejuwaan, Jordan. http://www.highexistence.com/alternate-sleep-cycles/
↑ バックミンスター・フラー、6時間毎に30分の睡眠をとる生活を2年間継続 “Dymaxion Sleep”. Time Magazine. (1943-10-11). http://www.time.com/time/magazine/article/0,9171,774680,00.html 2008年1月12日閲覧。.
↑ "Dymaxion," polyphasicsleep.