@article{ref1,
title="Significance of color vision disorders in traffic",
journal="Deutsche Medizinische Wochenschrift",
year="1972",
author="Gramberg-Danielsen, B.",
volume="97",
number="6",
pages="206-208",
abstract="Abstract unavailable.",
language="",
issn="0012-0472",
doi="",
url="http://dx.doi.org/"
}