@article{ref1,
title="Management of trauma. Nitrous oxide dangerous in pneumothorax",
journal="British medical journal: BMJ",
year="1993",
author="Old, S.",
volume="306",
number="6891",
pages="1539-1539",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}