@article{ref1,
title="Lake Nyos disaster",
journal="British medical journal: BMJ",
year="1989",
author="Freeth, S. J.",
volume="299",
number="6697",
pages="513-513",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}