@article{ref1,
title="Evaluation of mathematically equivalent tracking systems",
journal="Perceptual and motor skills",
year="1962",
author="Notterman, J. M. and Page, D. E.",
volume="15",
number="3",
pages="683-716",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0031-5125",
doi="10.2466/pms.1962.15.3.683",
url="http://dx.doi.org/10.2466/pms.1962.15.3.683"
}