@article{ref1,
title="Potential gains in longevity after midlife",
journal="Statistical Bulletin (Met. Life)",
year="1975",
author="",
volume="56",
number="Sep",
pages="8-10",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0026-1513",
doi="",
url="http://dx.doi.org/"
}