@article{ref1,
title="Three cases of pneumothorax caused by work accidents",
journal="Minerva medica",
year="1955",
author="Cattinelli, L.",
volume="46",
number="65-66",
pages="324-328",
abstract="<p>[Abstract unavailable]</p><p>Language: it</p>",
language="it",
issn="0026-4806",
doi="",
url="http://dx.doi.org/"
}