@article{ref1,
title="Portable devices for measuring performance in the field: the effects of sleep deprivation and night shift on the performance of computer operators",
journal="Ergonomics",
year="1979",
author="Glenville, M. and Wilkinson, R. T.",
volume="22",
number="8",
pages="927-933",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}