@article{ref1,
title="Theories, models, and human-machine systems",
journal="Mathematical modelling",
year="1983",
author="Funk, Kenneth H.",
volume="4",
number="6",
pages="567-587",
abstract="Theories and models play important roles in the development and refinement of knowledge. This paper distinguishes between the two terms and illustrates them. A theory of the operator in human-machine systems, posed in the predicate calculus, is developed. Six axioms address multitask behavior and the response to events. A model of the theory is defined set-theoretically. Issues and implications are briefly explored.<p />",
language="",
issn="0270-0255",
doi="10.1016/0270-0255(83)90016-7",
url="http://dx.doi.org/10.1016/0270-0255(83)90016-7"
}