@article{ref1,
title="Work/rest: Part I - Guidelines for the practitioner",
journal="International journal of industrial ergonomics",
year="1998",
author="Konz, S.",
volume="22",
number="1-2",
pages="67-71",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0169-8141",
doi="",
url="http://dx.doi.org/"
}