@article{ref1,
title="An investigation of conditions influencing the development of perceptual sets",
journal="Aerospace medical research laboratories technical reports",
year="1963",
author="Wickens, D. D. and Chambers, A. N.",
volume="63",
number="98",
pages="1-26",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0192-317X",
doi="",
url="http://dx.doi.org/"
}