@article{ref1,
title="Helicopter pilots and flight fatigue",
journal="Rivista di medicina aeronautica e spaziale",
year="1977",
author="Ravaccia, F. and Ruggieri, G. and Torrisi, S.",
volume="40",
number="3-4",
pages="278-295",
abstract="<p>[Abstract unavailable]</p> <p>Language: it</p>",
language="it",
issn="0035-631X",
doi="",
url="http://dx.doi.org/"
}