@article{ref1,
title="Searching for the countermeasure of night-shift sleepiness",
journal="Sleep",
year="2006",
author="Akerstedt, Torbjörn",
volume="29",
number="1",
pages="19-20",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0161-8105",
doi="",
url="http://dx.doi.org/"
}