@article{ref1,
title="Visual performance with high-contrast cathode-ray tubes at high levels of ambient illumination",
journal="Human factors",
year="1972",
author="Knowles, W. B. and Wulfeck, J. W.",
volume="14",
number="6",
pages="521-532",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}