@article{ref1,
title="Tactual coding of cylindrical knobs",
journal="Human factors",
year="1967",
author="Bradley, J. V.",
volume="9",
number="5",
pages="483-496",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}