@article{te Velde2012,
author = {te Velde, E. and Habbema, D. and Leridon, H. and Eijkemans, M.},
title= {The effect of postponement of first motherhood on permanent involuntary childlessness and total fertility rate in six European countries since the 1970s},
year = {2012},
doi = {10.1093/humrep/der455},
volume = {27},
number = {4},
pages = {1179--1183},
}