@article{ref1,
title="Causes of death in old age",
journal="Geriatrics",
year="1968",
author="Sigurjonsson, J.",
volume="23",
number="1",
pages="152-157",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0016-867X",
doi="",
url="http://dx.doi.org/"
}