@article{ref1,
title="Myocardial contusion",
journal="American journal of surgery",
year="1957",
author="Hale, H. W. Jr and Martin, J. W.",
volume="93",
number="4",
pages="558-63; discussion, 563",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9610",
doi="",
url="http://dx.doi.org/"
}