@article{ref1,
title="Bi-directional generalization to auditory stimuli",
journal="Perceptual and motor skills",
year="1958",
author="Essman, Walter B.",
volume="8",
number="3",
pages="306-306",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0031-5125",
doi="10.2466/pms.1958.8.3.306",
url="http://dx.doi.org/10.2466/pms.1958.8.3.306"
}