@article{ref1,
title="Deafness after head injuries",
journal="London clinic medical journal",
year="1968",
author="Ballantyne, J.",
volume="9",
number="1",
pages="23-31",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0024-6018",
doi="",
url="http://dx.doi.org/"
}