@article{Van Poppel2001,
author = {Van Poppel, F. and Liefbroer, A. and Vermunt, J. and Smeenk, W.},
title= {Love, necessity and opportunity: Changing patterns of marital age homogamy in the Netherlands, 1850–1993},
year = {2001},
doi = {10.1080/00324720127681},
volume = {55},
number = {1},
pages = {1--13},
}