@article{ref1,
title="Stability of Activity Across the Lifespan",
journal="Activities, adaptation and aging",
year="1994",
author="Singleton, Jerome F. and Forbes, William F. and Agwani, Namrita",
volume="18",
number="1",
pages="19-27",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0192-4788",
doi="10.1300/J016v18n01_02",
url="http://dx.doi.org/10.1300/J016v18n01_02"
}