@article{ref1,
title="Phototropic eyeglasses for driving",
journal="Klinische Monatsblätter für Augenheilkunde (1963)",
year="1969",
author="Gramberg-Danielsen, B.",
volume="154",
number="4",
pages="565-569",
abstract="Abstract unavailable.",
language="",
issn="0023-2165",
doi="",
url="http://dx.doi.org/"
}