@article{ref1,
title="Prevention of toxic gas poisoning",
journal="Zhonghua Yi Xue Za Zhi (Beijing)",
year="1973",
author="",
volume="4",
number="",
pages="247-251",
abstract="<p>[Abstract unavailable]</p><p>Language: zh</p>",
language="zh",
issn="0376-2491",
doi="",
url="http://dx.doi.org/"
}