@article{ref1,
title="The effect of mixed visual contrast schedules on detection times for both free and horizontally structured visual search",
journal="Ergonomics",
year="1970",
author="Lovie, A. D. and Lovie, P.",
volume="13",
number="6",
pages="735-741",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}