@article{ref1,
title="Representation of the orientations of shapes",
journal="Acta psychologica",
year="1985",
author="Shepard, R. N. and Farrell, J. E.",
volume="59",
number="1",
pages="103-121",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-6918",
doi="",
url="http://dx.doi.org/"
}