@article{ref1,
title="Physical training intervention in female shift workers: I. The effects of intervention on fitness, fatigue, sleep, and psychosomatic symptoms",
journal="Ergonomics",
year="1988",
author="Härmä, M. I. and Ilmarinen, J. and Knauth, P. and Rutenfranz, J. and Hänninen, O.",
volume="31",
number="1",
pages="39-50",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0014-0139",
doi="10.1080/00140138808966647",
url="http://dx.doi.org/10.1080/00140138808966647"
}