@inbook{Billari2005,
author = {Billari, F.},
title= {Partnership, childbearing and parenting: Trends of the 1990s},
year = {2005},
URL = {http://www.unece.org/pau/_docs/pau/PAU_2005_Publ_NDRCh05.pdf},
booktitle = {The New Demographic Regime. Population Challenges and Policy Responses},
address = {Geneva},
publisher = {United Nations},
pages = {63--94},
}