@article{ref1,
title="Oxygen concentration in commercial aircraft flights",
journal="Southern medical journal",
year="1983",
author="McLeskey, C. H. and Stullken, E. H.",
volume="76",
number="10",
pages="1330-1330",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0038-4348",
doi="",
url="http://dx.doi.org/"
}