@article{ref1,
title="Analysis of relative and absolute absence from work as well as length of absence due to illness among young skilled workers of the 18 to 25 age group",
journal="Zeitschrift fur die Gesamte Hygiene und Ihre Grenzgebiete",
year="1981",
author="Ulrich, H. and Kersten, E.",
volume="27",
number="9",
pages="657-661",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0049-8610",
doi="",
url="http://dx.doi.org/"
}