@article{ref1,
title="Effects of exercise, bedrest and napping on performance decrement during 40 hours",
journal="Psychophysiology",
year="1976",
author="Lubin, A. and Hord, D. J. and Tracy, M. L. and Johnson, L. Clark",
volume="13",
number="4",
pages="334-339",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0048-5772",
doi="",
url="http://dx.doi.org/"
}