@article{ref1,
title="Blunt injuries of the gastrointestinal tract",
journal="Langenbecks archiv fur klinische chirurgie",
year="1974",
author="Petersen, H.",
volume="221",
number="2",
pages="110-119",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0174-4542",
doi="",
url="http://dx.doi.org/"
}