@article{Hoem2010,
author = {Hoem, J. M. and Kostova, D. and Gabrielli, G. and Matysiak, A. and Jasilioniene, A.},
title= {Levels of recent union formation: Six European countries compared},
year = {2010},
doi = {10.4054/DemRes.2010.22.9},
volume = {22},
pages = {199--210},
}