@article{Koops2017a,
author = "Judith C. Koops, Aart C. Liefbroer, Anne H. Gauthier",
title = "The Influence of Parental Educational Attainment on the Partnership Context at First Birth in 16 Western Societies",
year = 2017,
journal = "European Journal of Population",
url = " http://dx.doi.org/10.1007/s10680-017-9421-9 "
}