@article{Hiekel2015,
author = {Hiekel, N. and Liefbroer, A.C. and Poortman, A.R.},
title= {Marriage and separation risks among German cohabiters: Differences between types of cohabiter},
year = {2015},
doi = {10.1080/00324728.2015.1037334},
volume = {69},
number = {2},
pages = {237--251},
}