@article{Hank2001,
author = {Hank, K.},
title= {Changes in Swedish women’s individual activity status and the subsequent risk of giving birth in the 1980s and 1990s: An extension of studies by Gunnar Andersson and Britta Hoem},
year = {2001},
doi = {10.4054/DemRes.2001.4.4 },
URL = {http://www.demographic-research.org/Volumes/Vol4/4/},
journal = {Demographic Research},
volume = {4},
number = {4},
pages = {125--132},
}