@article{ref1,
title="Protection afforded the cerebrovascular system by the cerebrospinal fluid under the stress of negative G",
journal="Journal of aviation medicine",
year="1949",
author="Beckman, E. L.",
volume="20",
number="6",
pages="430-8, illust",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0095-991X",
doi="",
url="http://dx.doi.org/"
}