@article{ref1,
title="Inversion illusion in parabolic flight: its probable dependence on otolith function",
journal="Aerospace medicine",
year="1967",
author="Graybiel, A. and Kellogg, R. S.",
volume="38",
number="11",
pages="1099-1103",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}