@article{ref1,
title="Eye movements during vigilance",
journal="Perceptual and motor skills",
year="1964",
author="MACKWORTH, N. H. and Kaplan, I. T. and Metlay, W.",
volume="18",
number="2",
pages="397-402",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0031-5125",
doi="10.2466/pms.1964.18.2.397",
url="http://dx.doi.org/10.2466/pms.1964.18.2.397"
}