@article{van Nimwegen2010,
author = {van Nimwegen, N. and van der Erf, R.},
title= {Europe at the crossroads: Demographic challenges and international migration},
year = {2010},
doi = {10.1080/1369183X.2010.515132},
volume = {36},
number = {9},
pages = {1359--1379},
}