@article{ref1,
title="Swimming cramps as cause of accidental drowning. Part I",
journal="Social-Medicinsk Tidskrift",
year="1950",
author="Butler, P.",
volume="27",
number="4",
pages="73-82",
abstract="<p>[Abstract unavailable]</p><p>Language: un</p>",
language="un",
issn="0037-833X",
doi="",
url="http://dx.doi.org/"
}