@article{ref1,
title="Heart injury caused by a steel bolt",
journal="Zentralblatt fur Chirurgie",
year="1980",
author="Ansorg, P. and Henke, R.",
volume="105",
number="4",
pages="234-235",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-409X",
doi="",
url="http://dx.doi.org/"
}