@article{ref1,
title="A closed-loop causal model of workload based on a comparison of fuzzy and crisp measurement techniques",
journal="Human factors",
year="1987",
author="Moray, N. and King, B. and Turksen, B. and Waterton, K.",
volume="29",
number="3",
pages="339-348",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}