@article{ref1,
title="View of human problems to be addressed for long-duration space flights",
journal="Aerospace medicine",
year="1973",
author="Berry, C. A.",
volume="44",
number="10",
pages="1136-1146",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}