@article{ref1,
title="Psychobiologic effects of prolonged bed rest (weightless) in young, healthy volunteers (Study II)",
journal="Aerospace medicine",
year="1971",
author="Ryback, R. S. and Lewis, O. F. and Lessard, C. S.",
volume="42",
number="5",
pages="529-535",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}