@article{Liefbroer1991,
author = {Liefbroer, A.},
title= {The Choice Between a Married or Unmarried Cohabitation. A Competing Risk Analysis},
year = {1991},
doi = {10.1007/BF01796842},
journal = {European Journal of Population},
volume = {7},
number = {3},
pages = {273--298},
}