@article{ref1,
title="Problems of aging in regard to traffic from the standpoint of the ophthalmologist",
journal="Deutsche Medizinische Wochenschrift",
year="1961",
author="Gramberg-Danielsen, B.",
volume="86",
number="",
pages="2089-2091",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0012-0472",
doi="",
url="http://dx.doi.org/"
}