@inbook{Sobotka2008,
author = {Sobotka, T.},
title= {Does persistent low fertility threaten the future of European populations?},
year = {2008},
editor = {Surkyn, J.},
editor = {Bavel, J. van},
editor = {Deboosere, P.},
booktitle = {Demographic Challenges for the 21st Century. A State of Art in Demography},
address = {Brussels},
publisher = {VUBPRESS},
pages = {27--89},
}