@article{ref1,
title="Epicritical observations on the problem of color perception in traffic",
journal="Bericht uber die Zusammenkunft - Deutsche Ophthalmologische Gesellschaft",
year="1961",
author="Gramberg-Danielsen, B.",
volume="64",
number="",
pages="529-532",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0070-427X",
doi="",
url="http://dx.doi.org/"
}