@article{ref1,
title="Case of bilateral conductive hearing loss after head injury with a ball",
journal="Otolaryngologia polska",
year="1984",
author="Gerwatowska, W. and Markucki, S.",
volume="38",
number="4",
pages="327-331",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0030-6657",
doi="",
url="http://dx.doi.org/"
}