@article{ref1,
title="Asphyxia with nitrogen",
journal="British medical journal: BMJ",
year="1959",
author="Weller, M. A.",
volume="1",
number="5121",
pages="559-559",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}