@article{ref1,
title="The Application of Visible and Invisible, Especially Infrared Rays for Signalling and Road Safety",
journal="Physikalische Zeitschrift",
year="1931",
author="Gresky, G",
volume="32",
number="",
pages="193-212",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="",
doi="",
url="http://dx.doi.org/"
}