@article{ref1,
title="Sleep duration at home and sleepiness on the job in rotating twelve-hour shift workers",
journal="Human factors",
year="1987",
author="Bremer, D. A. and Anderson, R. M.",
volume="29",
number="4",
pages="477-481",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}