@article{ref1,
title="The effect of area, density, and number of background characters on visual search",
journal="Human factors",
year="1978",
author="Drury, C. G. and Clement, M. R.",
volume="20",
number="5",
pages="597-602",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}