@article{ref1,
title="Limitations of the cognitive vigilance increment",
journal="Human factors",
year="1987",
author="Holding, D. H. and Ash, D. W. and Noonan, T. K. and Loeb, M.",
volume="29",
number="6",
pages="661-674",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}