@article{ref1,
title="The eye in young and aged subjects. Traffic medicine problems",
journal="Hefte zur Unfallheilkunde",
year="1962",
author="Hager, G.",
volume="71",
number="",
pages="159-168",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0085-1469",
doi="",
url="http://dx.doi.org/"
}