@article{ref1,
title="An empirical tautology",
journal="Perceptual and motor skills",
year="1969",
author="Allen, R. M.",
volume="29",
number="1",
pages="50-50",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-5125",
doi="",
url="http://dx.doi.org/"
}