@article{ref1,
title="Physiological status and disengagement theory: a study on a model population",
journal="Mechanisms of ageing and development",
year="1973",
author="Warren, N. D.",
volume="2",
number="1",
pages="55-96",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0047-6374",
doi="",
url="http://dx.doi.org/"
}