@article{ref1,
title="Cases of death while playing football",
journal="Zeitschrift fur Arztliche Fortbildung (Jena)",
year="1955",
author="Krefft, S.",
volume="49",
number="22",
pages="827-831",
abstract="<p>[Abstract unavailable]  Keywords: Soccer </p> <p>Language: de</p>",
language="de",
issn="0044-2178",
doi="",
url="http://dx.doi.org/"
}