@article{ref1,
title="Codes and modalities in multiple resources: a success and a qualification",
journal="Human factors",
year="1988",
author="Wickens, Christopher D. and Liu, Yunbo",
volume="30",
number="5",
pages="599-616",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}