@article{Holstein2019,
author = {Holstein, B.E. and Ammitzbøll, J. and Damsgaard, M.T. and Pant, S.W. and Pedersen, T.P. and Skovgaard, A.M. },
title= {Difficulties falling asleep among adolescents: Social inequality and time trends 1991–2018},
year = {2019},
doi = {10.1111/jsr.12941},
volume = {29},
number = {1},
pages = {12941},
}