Kripke, D F <br/><br/>
Ultradian sleep rhythms and cortisol.  [electronic resource] 

 -  Biological psychiatry  Jul 1987 
 - 928 p.  digital 
<br/><br/> Publication Type: Letter 
<br/><br/><label>ISSN: </label>0006-3223 
<br/><br/><label>Standard No.: </label>10.1016/0006-3223(87)90095-3  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Circadian Rhythm<br/>Humans<br/>Hydrocortisone--blood<br/>Sleep Stages--physiology<br/>Sleep, REM--physiology