@article{ref1,
title="The validity of subjective reports of visual discomfort",
journal="Human factors",
year="1986",
author="Howarth, P. A. and Istance, H. O.",
volume="28",
number="3",
pages="347-351",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}