@article{ref1,
title="Depth perception of double images in the vicinity of other images",
journal="Acta psychologica",
year="1956",
author="Zajac, JL",
volume="12",
number="",
pages="111-129",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0001-6918",
doi="",
url="http://dx.doi.org/"
}