@article{ref1,
title="Invisible gas: who's liable?",
journal="Texas medicine",
year="1993",
author="Levin, J. L. and Pizzino, J. P. and Kronenberg, R. S.",
volume="89",
number="4",
pages="58-60",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0040-4470",
doi="",
url="http://dx.doi.org/"
}