@article{ref1,
title="Psychiatric evaluation of candidates for space flight",
journal="American journal of psychiatry",
year="1959",
author="Ruff, G. E. and Levy, E. Z.",
volume="116",
number="",
pages="385-391",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-953X",
doi="",
url="http://dx.doi.org/"
}