@article{ref1,
title="On Longevity",
journal="Provincial medical and surgical journal (1844)",
year="1849",
author="Smith, H. l.",
volume="13",
number="14",
pages="372-377",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="2041-997X",
doi="",
url="http://dx.doi.org/"
}