@article{ref1,
title="The prevalence of work-related sleep problems",
journal="Journal of general internal medicine",
year="1995",
author="Pack, Allan I.",
volume="10",
number="1",
pages="57-57",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0884-8734",
doi="",
url="http://dx.doi.org/"
}