@article{ref1,
title="Effects of sports and exercise in pregnancy. With guidelines for patients",
journal="Postgraduate medicine",
year="1985",
author="Maeder, E. C.",
volume="77",
number="2",
pages="112, 114-112, 114",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0032-5481",
doi="",
url="http://dx.doi.org/"
}