Does Natural Daylight Influence Nocturnal Melatonin Production? : A Pilot Study  / Barbara Griefahn, Anja Kraneburg
  Bibliogr.: p. 28-31. - Abstr. eng.
  In: Central European Journal of Occupational and Environmental Medicine. - ISSN 1219-1221. - 2016. 22. évf. 1-2. sz., p. 19-31. : ill.