@article{ref1,
title="Cabin pressurization characteristics of USAF and commercial transport aircraft",
journal="Aeromedical reviews",
year="1967",
author="Greenwald, A. J. and McIver, R. G.",
volume="2",
number="",
pages="1-20",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0065-3683",
doi="",
url="http://dx.doi.org/"
}