@article{Surkyn2004,
author = {Surkyn, J. and Lesthaeghe, R.},
title= {Value orientations and the second demographic transition (SDT) in Northern, Western and Southern Europe: An update},
year = {2004},
doi = {10.4054/DemRes.2004.S3.3},
volume = {3},
number = {3},
pages = {45--86},
}