@inbook{Gustafsson2003,
author = {Gustafsson, S. },
title= {Optimal age at motherhood. Theoretical and empirical considerations on postponement of maternity in Europe},
year = {2003},
doi = {10.1007/978-3-642-55573-2_17},
editor = {Zimmermann, K.F.},
editor = {Vogler, M.},
booktitle = {Family, Household and Work},
address = {Berlin/Heidelberg},
publisher = {Springer-Verlag},
pages = {345−367},
}