@article{ref1,
title="Vertical-Horizontal illusion and surrounding field",
journal="Acta psychologica",
year="1957",
author="Kunnapas, TM",
volume="13",
number="",
pages="35-42",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0001-6918",
doi="",
url="http://dx.doi.org/"
}