@article{Liefbroer1991,
author = {Liefbroer, A.C},
title= {The choice between a married or unmarried first union by young adults},
year = {1991},
doi = {10.2307/20164585},
journal = {European Journal of Population/Revue Européenne de Démographie},
volume = {7},
number = {3},
pages = {273--298},
}