@article{ref1,
title="Critical flicker frequency as a function of viewing distance, stimulus size and luminance",
journal="Vision research",
year="1970",
author="Harvey, L. O. Jr",
volume="10",
number="1",
pages="55-63",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0042-6989",
doi="",
url="http://dx.doi.org/"
}