@article{ref1,
title="Visual performance and fatigue under conditions of varied illumination",
journal="American journal of ophthalmology",
year="1952",
author="Brozek, J. and Simonson, E.",
volume="35",
number="1",
pages="33-46",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0002-9394",
doi="",
url="http://dx.doi.org/"
}