@article{ref1,
title="Time-on-task period for unimpaired tracking performance",
journal="Ergonomics",
year="1986",
author="Beshir, M. Y.",
volume="29",
number="3",
pages="423-431",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}