@inbook{Sobotka2008,
author = {Sobotka, T.},
title= {Does persistent low fertility threaten the future of European populations?},
year = {2008},
editor = {Surkyn, J.},
editor = {Deboosere, P.},
editor = {van Bavel, J.},
booktitle = {Demographic Challenges for the 21st Century: A State of the Art in Demography},
address = {Brussels},
publisher = {Vrije Universiteit Press},
pages = {115--141},
}