@article{ref1,
title="Vitamin A deficiency and dark adaptation in children",
journal="Journal of Pediatric Gastroenterology and Nutrition",
year="1982",
author="Zak, T. A.",
volume="1",
number="4",
pages="467-468",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0277-2116",
doi="",
url="http://dx.doi.org/"
}