@article{Kalmijn2012,
author = {Kalmijn, M.},
title= {Longitudinal analyses of the effects of age, marriage, and parenthood on social contacts and support},
year = {2012},
doi = {10.1016/j.alcr.2012.08.002},
journal = {Advances in Life Course Research},
volume = {17},
number = {4},
pages = {177--190},
}