@article{ref1,
title="Visual illusions and aircraft accidents. SAM-TR-67-28",
journal="USAF School of Aerospace Medicine technical report: SAM-TR",
year="1967",
author="Pitts, D. G.",
volume="",
number="",
pages="1-31",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="",
doi="",
url="http://dx.doi.org/"
}