@article{ref1,
title="Influence of weightlessness upon the skeleton: a review",
journal="Aerospace medicine",
year="1968",
author="Hattner, R. S. and McMillan, D. E.",
volume="39",
number="8",
pages="849-855",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}