@article{ref1,
title="Ophthalmological technical traffic problems with special reference to optical perception time",
journal="Bericht uber die Zusammenkunft - Deutsche Ophthalmologische Gesellschaft",
year="1961",
author="Lisch, K.",
volume="64",
number="",
pages="539-542",
abstract="Abstract unavailable.",
language="",
issn="0070-427X",
doi="",
url="http://dx.doi.org/"
}