@article{ref1,
title="Nonpenetrating abdominal trauma",
journal="GP",
year="1958",
author="Lichtenstein, M. E.",
volume="17",
number="3",
pages="108-114",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0016-3600",
doi="",
url="http://dx.doi.org/"
}