@article{ref1,
title="Color asthenopia and function of the zonal light filter",
journal="Ceskoslovenská Oftalmologie",
year="1977",
author="Malec, J.",
volume="33",
number="5",
pages="333-335",
abstract="<p>[Abstract unavailable]</p><p>Language: cs</p>",
language="cs",
issn="0009-059X",
doi="",
url="http://dx.doi.org/"
}