@article{ref1,
title="Suicide in the widowed",
journal="American journal of epidemiology",
year="1965",
author="Macmahon, B. and Pugh, T. F.",
volume="81",
number="",
pages="23-31",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9262",
doi="",
url="http://dx.doi.org/"
}