@article{ref1,
title="Disorders of color and twilight vision and their practical significance in modern traffic",
journal="Medizinische",
year="1955",
author="Heinsius, E.",
volume="27-8",
number="",
pages="971-976",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0342-1147",
doi="",
url="http://dx.doi.org/"
}