@article{ref1,
title="Apparent size and contrast",
journal="Vision research",
year="1975",
author="Weale, R. A.",
volume="15",
number="",
pages="949-955",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0042-6989",
doi="",
url="http://dx.doi.org/"
}