@article{ref1,
title="Unusual cranial fracture caused by an airplane accident",
journal="Rivista di medicina aeronautica",
year="1951",
author="Polizzi di sorrentino, A.",
volume="14",
number="3",
pages="538-545",
abstract="<p>[Abstract unavailable]</p> <p>Language: un</p>",
language="un",
issn="0301-6757",
doi="",
url="http://dx.doi.org/"
}