@article{ref1,
title="Speech intelligibility as a function of ambient pressure and Heo 2 atmosphere",
journal="Aerospace medicine",
year="1973",
author="Hollien, H. and Thompson, C. L. and Cannon, B.",
volume="44",
number="3",
pages="249-253",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}