@article{ref1,
title="Fatal accidents caused by agricultural tractors",
journal="La Medicina del lavoro",
year="1971",
author="Mascia, D. and Norelli, G. A.",
volume="62",
number="4",
pages="213-218",
abstract="<p>[Abstract unavailable]</p><p>Language: it</p>",
language="it",
issn="0025-7818",
doi="",
url="http://dx.doi.org/"
}