@article{ref1,
title="Cardiac trauma (heart tamponade, commotio cordis, etc.)",
journal="Deutsches Medizinisches Journal",
year="1956",
author="Nissen, R.",
volume="7",
number="9-10",
pages="265-267",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0012-1320",
doi="",
url="http://dx.doi.org/"
}