@article{ref1,
title="Type, extent and coding of updated symbolic information",
journal="Human factors",
year="1966",
author="Vicino, F. L. and Andrews, R. S. and Ringel, Seymour",
volume="8",
number="5",
pages="407-416",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}