@article{ref1,
title="Effects of recumbency and space flight on bone density",
journal="American journal of clinical nutrition",
year="1967",
author="Mack, P. B. and LaChance, P. L.",
volume="20",
number="11",
pages="1194-1205",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9165",
doi="",
url="http://dx.doi.org/"
}