@article{ref1,
title="A self-contained air system and protective suit",
journal="Aerospace medicine",
year="1963",
author="Billingsley, J. G. and Levora, N.",
volume="34",
number="",
pages="1142-1146",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}