@article{ref1,
title="Observation of the elevator illusion during subgravity preceded by negative accelerations",
journal="Aerospace medicine",
year="1964",
author="Roman, J. A. and Warren, B. H. and Graybiel, A.",
volume="35",
number="",
pages="121-124",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}