@article{ref1,
title="Work and age",
journal="Age and ageing",
year="1972",
author="Hearnshaw, L. S.",
volume="1",
number="2",
pages="81-87",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-0729",
doi="",
url="http://dx.doi.org/"
}