@article{ref1,
title="Periodic medical examinations in occupational medicine",
journal="Sozial und Praventivmedizin",
year="1975",
author="Lob, M.",
volume="20",
number="3-4",
pages="161-164",
abstract="<p>[Abstract unavailable]</p><p>Language: fr</p>",
language="fr",
issn="0303-8408",
doi="",
url="http://dx.doi.org/"
}