@article{Hagen2013,
author = {Hagen, E.W. and Mirer, A.G. and Palta, M. and Peppard, P.E.},
title= {The sleep-time cost of parenting: Sleep duration and sleepiness among employed parents in the Wisconsin Sleep Cohort Study},
year = {2013},
doi = {10.1093/aje/kws246},
volume = {177},
number = {5},
pages = {394--401},
}