@article{Köppen2018,
author = {Köppen, K. and Kreyenfeld, M. and Trappe, H.},
title= {Loose ties? Determinants of father-child contact after separation in Germany},
year = {2018},
doi = {10.1111/jomf.12504},
volume = {80},
number = {5},
pages = {1163--1175},
}