@article{ref1,
title="The prevalence of spatial contrast in visual perception",
journal="British journal of psychology (1904)",
year="1916",
author="Smith, W. G.",
volume="8",
number="3",
pages="317-326",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0950-5652",
doi="10.1111/j.2044-8295.1916.tb00136.x",
url="http://dx.doi.org/10.1111/j.2044-8295.1916.tb00136.x"
}