@article{ref1,
title="External and internal attentional environments. I. The utilization of cardiac deceleratory and acceleratory response data for evaluating differences in mental workload between machine-paced and self-paced work",
journal="Ergonomics",
year="1982",
author="Sharit, J. and Salvendy, G. and Deisenroth, Michael P.",
volume="25",
number="2",
pages="107-120",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0014-0139",
doi="10.1080/00140138208924931",
url="http://dx.doi.org/10.1080/00140138208924931"
}