@article{ref1,
title="Physical training and +Gz tolerance",
journal="Aviation, space, and environmental medicine",
year="1984",
author="Balldin, U. I.",
volume="55",
number="11",
pages="991-992",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0095-6562",
doi="",
url="http://dx.doi.org/"
}