@article{ref1,
title="Health and sanitary documentation of work contracts",
journal="La Medicina del lavoro",
year="1975",
author="Casula, D.",
volume="66",
number="5",
pages="383-396",
abstract="<p>[Abstract unavailable]</p><p>Language: it</p>",
language="it",
issn="0025-7818",
doi="",
url="http://dx.doi.org/"
}