@article{ref1,
title="Visual constancy during movement: 1. Effects of 5's forward and backward movement on size constancy",
journal="Perceptual and motor skills",
year="1964",
author="Gregory, R. L. and Ross, Helen E.",
volume="18",
number="1",
pages="3-8",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0031-5125",
doi="10.2466/pms.1964.18.1.3",
url="http://dx.doi.org/10.2466/pms.1964.18.1.3"
}