@article{Habbema2015,
author = {Habbema, J.D.F. and Eijkemans, M.J. and Leridon, H. and te Velde, E.R.},
title= {Realizing a desired family size: When should couples start?},
year = {2015},
doi = {10.1093/humrep/dev148},
volume = {30},
number = {9},
pages = {2215--2221},
}