@article{ref1,
title="A methodology for quantifying the effects of aging on perceptual-motor capability",
journal="Human factors",
year="1981",
author="Levison, William",
volume="23",
number="1",
pages="87-96",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}