@article{ref1,
title="A prospective clinical and epidemiological study of head injuries in northern Italy: the commune of Ravenna",
journal="Neurosurgical review",
year="1989",
author="Servadei, F. and Ciucci, G. and Piazza, G. and Bianchedi, G. and Rebucci, G. and Gaist, G.",
volume="12 Suppl 1",
number="",
pages="429-435",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0344-5607",
doi="",
url="http://dx.doi.org/"
}