@article{ref1,
title="Human voluntary tolerance to vertical impact",
journal="Aerospace medicine",
year="1960",
author="Swearingen, J. J. and McFadden, E. B. and Garner, J. D. and Blethrow, J. W.",
volume="31",
number="",
pages="989-998",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}