@article{ref1,
title="Mass examinations of professional drivers",
journal="Deutsche Medizinische Wochenschrift",
year="1957",
author="Hoffmann, H.",
volume="82",
number="52",
pages="2219-2222",
abstract="<p>[Abstract unavailable]</p> <p>Language: de</p>",
language="de",
issn="0012-0472",
doi="",
url="http://dx.doi.org/"
}