@article{ref1,
title="The physical in mental alertness",
journal="Journal of the Association for Physical and Mental Rehabilitation",
year="1966",
author="Clarke, H. H.",
volume="20",
number="4",
pages="134-139",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0098-8448",
doi="",
url="http://dx.doi.org/"
}