@article{Baizán2003,
author = {Baizán, P. and Aassve, A. and Billari, F.C.},
title= {Cohabitation, marriage, and first birth: The interrelationship of family formation events in Spain},
year = {2003},
doi = {10.1023/A:1023343001627},
journal = {European Journal of Population},
volume = {19},
number = {2},
pages = {147--169},
}