@article{ref1,
title="A two-term exponential functional description of the time course of sustained attention",
journal="Human factors",
year="1987",
author="Giambra, L. M. and Quilter, R. E.",
volume="29",
number="6",
pages="635-643",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}