@article{ref1,
title="Coupling effects and performance in viligance tasks",
journal="Human factors",
year="1970",
author="Soderquist, D. R. and Hatfield, J. L.",
volume="12",
number="4",
pages="351-359",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}