@article{ref1,
title="Signal detection theory and probability matching apply to vigilance",
journal="Human factors",
year="1987",
author="Craig, A.",
volume="29",
number="6",
pages="645-652",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}