@article{Rözer2017,
author = {Rözer, J.J. and Poortman, A.R. and Mollenhorst, G.},
title= {The timing of parenthood and its effect on social contact and support},
year = {2017},
doi = {10.4054/DemRes.2017.36.62},
volume = {36},
number = {62},
pages = {1889--1916},
}