@article{ref1,
title="A comparison of vertical and horizontal arrangements of alpha-numeric material: Experiment I",
journal="Human factors",
year="1961",
author="Coffey, JL",
volume="3",
number="2",
pages="93-98",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}