@article{ref1,
title="Maternal death from aspiration asphyxia",
journal="British medical journal: BMJ",
year="1956",
author="Parker, R. B.",
volume="2",
number="4983",
pages="16-19",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}