@article{ref1,
title="Toxicity of the oxides of nitrogen. I. Introduction and apparatus",
journal="AMA archives of industrial health",
year="1954",
author="Gray, E. L. and Goldberg, S. B. and Patton, F. M.",
volume="10",
number="5",
pages="409-417",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0567-3933",
doi="",
url="http://dx.doi.org/"
}