@article{Dahlberg2018,
author = {Dahlberg, J. and Andersson, G.},
title= {Changing seasonal variation in births by sociodemographic factors: A population-based register study},
year = {2018},
doi = {10.1093/hropen/hoy015},
volume = {2018},
number = {4},
pages = {1‒8},
}