@article{ref1,
title="Swimming by expectant mothers",
journal="Josanpu zasshi",
year="1979",
author="Murooka, K.",
volume="33",
number="10",
pages="729-732",
abstract="<p>[Abstract unavailable]</p><p>Language: ja</p>",
language="ja",
issn="0047-1836",
doi="",
url="http://dx.doi.org/"
}