@article{Poortman2007,
author = {Poortman, A.-R.},
title= {The first cut is the deepest? The role of the relationship career for union formation},
year = {2007},
doi = {10.1093/esr/jcm024},
journal = {European Sociological Review},
volume = {23},
number = {5},
pages = {585--598},
}