@article{ref1,
title="Knee impacts, a frequent mechanism of injury in automobile and motorcycle riders",
journal="Langenbecks archiv fur klinische chirurgie",
year="1960",
author="Vollmar, J.",
volume="295",
number="",
pages="315-320",
abstract="Abstract unavailable.",
language="",
issn="0174-4542",
doi="",
url="http://dx.doi.org/"
}