@article{ref1,
title="Patello-femoral joint. Causes, forms and concomittant injuries of the patella fracture",
journal="Hefte zur Unfallheilkunde",
year="1975",
author="Magerl, F.",
volume="",
number="120",
pages="45-60",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0085-1469",
doi="",
url="http://dx.doi.org/"
}