@article{ref1,
title="Ruptured ventricle. Incidence in population of London, 1957-8",
journal="British medical journal: BMJ",
year="1960",
author="Crawford, M. D. and Morris, J. N.",
volume="2",
number="5213",
pages="1624-1626",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}