@article{ref1,
title="Pneumopericardium following closed chest injury: a report of two cases",
journal="Injury",
year="1973",
author="Cargill, A. O. and Galasko, C. S. and Gunning, A. J.",
volume="4",
number="3",
pages="221-224",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0020-1383",
doi="",
url="http://dx.doi.org/"
}