@article{ref1,
title="The mortality of widowers",
journal="Lancet",
year="1963",
author="Young, M. and Benjamin, B. and Wallis, C.",
volume="2",
number="7305",
pages="454-456",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0140-6736",
doi="",
url="http://dx.doi.org/"
}