@article{ref1,
title="Connection between dark adaptation and vitamin A and carotene concentration in the blood",
journal="International journal for vitamin and nutrition research",
year="1976",
author="Rankov, B.",
volume="46",
number="1",
pages="100-104",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0300-9831",
doi="",
url="http://dx.doi.org/"
}