@article{ref1,
title="Looking into LOX. The benefits and limitations of liquid oxygen systems for air medical helicopters",
journal="Journal of air medical transport",
year="1990",
author="Idol, W. D.",
volume="9",
number="11",
pages="18-21",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9095",
doi="",
url="http://dx.doi.org/"
}