@article{ref1,
title="Therapeutic effects of vitamin A on light-dark adaptation disorders and color perception disorders in patients with chronic liver diseases",
journal="Zeitschrift fur die Gesamte Innere Medizin und Ihre Grenzgebiete",
year="1974",
author="Klein, S. and Dökert, B. and Marré, E. and Renger, F. and Westermann, K.",
volume="29",
number="12",
pages="484-487",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-2542",
doi="",
url="http://dx.doi.org/"
}