@article{ref1,
title="Myocardial trauma produced by nonpenetrating chest injury",
journal="American heart journal",
year="1957",
author="Borodkin, H. D. and Massey, F. C.",
volume="53",
number="5",
pages="795-801",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-8703",
doi="",
url="http://dx.doi.org/"
}