@article{ref1,
title="Psychiatry of old age: Depression in old age",
journal="Reviews in clinical gerontology",
year="1991",
author="Katona, Cornelius L. E.",
volume="1",
number="4",
pages="371-384",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0959-2598",
doi="10.1017/S0959259800002884",
url="http://dx.doi.org/10.1017/S0959259800002884"
}