@article{ref1,
title="A two-factor theory of vigilance in the light of recent studies",
journal="Acta psychologica",
year="1967",
author="McCormack, P. D.",
volume="27",
number="",
pages="400-409",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0001-6918",
doi="",
url="http://dx.doi.org/"
}