title: [Problems presented by the rhythm wakefulness--sleep in the course of cosmic flights].
mesh_terms: D000337:Aerospace Medicine; D001683:Biological Clocks; D002940:Circadian Rhythm; D006801:Humans; D012890:Sleep; D012892:Sleep Deprivation; D012894:Sleep Stages; D013026:Space Flight; D014851:Wakefulness; D014893:Weightlessness
vernacular_title: Problèmes posés par le rythme veille-sommeil au cours des vols cosmonautiques.