@article{ref1,
title="Recognition of colored road traffic light signals by normal and color-vision-defective observers",
journal="Journal of the Optical Society of America",
year="1964",
author="Nathan, J. and Henry, G. H. and Cole, Barry L.",
volume="54",
number="8",
pages="1041-1045",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0030-3941",
doi="",
url="http://dx.doi.org/"
}