@articleDiethelm_Libuda_Bolzenius_Griefahn_Buyken_Remer_2010, title=Longitudinal Associations between Endogenous Melatonin Production and Reported Sleep Duration from Childhood to Early Adulthood, DOI=10.1159/000303134, journal=Hormone Research in Paediatrics, author=Diethelm, Katharina and Libuda, Lars and Bolzenius, Katja and Griefahn, Barbara and Buyken, Anette and Remer, Thomas, year=2010, pages=390–398