@article{ref1,
title="Nonpenetrating abdominal trauma",
journal="Journal-Lancet",
year="1957",
author="Lichtenstein, M. E.",
volume="77",
number="8",
pages="281-287",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0096-0233",
doi="",
url="http://dx.doi.org/"
}