@article{ref1,
title="Two linear rate-field displays",
journal="Human factors",
year="1971",
author="Swartzendruber, L. and Ince, F. and Williges, R. C. and Roscoe, Stanley N.",
volume="13",
number="6",
pages="569-575",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}