@article{ref1,
title="Carbon dioxide tolerance studies. SAM-TR-67-77",
journal="USAF School of Aerospace Medicine technical report: SAM-TR",
year="1967",
author="Glatte, H. A. and Motsay, G. J. and Welch, B. E.",
volume="",
number="",
pages="1-22",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="",
doi="",
url="http://dx.doi.org/"
}