@article{ref1,
title="Protective helmet and safety belt",
journal="Medizinische Klinik [Urban und Schwarzenberg]",
year="1972",
author="Handel, K.",
volume="67",
number="1",
pages="30-33",
abstract="Abstract unavailable.",
language="",
issn="0025-8458",
doi="",
url="http://dx.doi.org/"
}