@article{ref1,
title="The use of helmets by motorcyclists. laboratory test and our clinical experience",
journal="Stomatologia Mediterranea",
year="1987",
author="Ferlito, S. and Bellorofonte, G. and Rapisarda, E.",
volume="7",
number="3",
pages="377-384",
abstract="Abstract unavailable.",
language="",
issn="1120-9402",
doi="",
url="http://dx.doi.org/"
}