@article{ref1,
title="Effect of position upon warning light effectiveness",
journal="Perceptual and motor skills",
year="1956",
author="Elliott, Donald N. and Howard, Edward F.",
volume="6",
number="3",
pages="69-72",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0031-5125",
doi="10.2466/pms.1956.6.3.69",
url="http://dx.doi.org/10.2466/pms.1956.6.3.69"
}