@article{ref1,
title="The sleep of long-haul truck drivers",
journal="New England journal of medicine",
year="1998",
author="Green, M. J.",
volume="338",
number="6",
pages="390-391",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0028-4793",
doi="",
url="http://dx.doi.org/"
}