@article{ref1,
title="Hip fractures up to date",
journal="British medical journal: BMJ",
year="1976",
author="Ring, P. A.",
volume="2",
number="6049",
pages="1429-1431",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}