@article{ref1,
title="Safety of medical accelerators",
journal="Strahlentherapie",
year="1974",
author="Schittenhelm, R.",
volume="148",
number="5",
pages="520-526",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0039-2073",
doi="",
url="http://dx.doi.org/"
}