We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleTrends in timing of sleep in the general population of Norway: 1980 to 20001.AuthorsSivertsen B; Øverland S; Pallesen SPublicationPerceptual and motor skills, 2011, Vol 113, Issue 2, p509ISSN0031-5125Publication typearticleDOI10.2466/02.06.13.PMS.113.5.509-518