@article{ref1,
title="Biophysical basis for possible ultrasonic hazards",
journal="British journal of radiology",
year="1971",
author="Hill, C. R.",
volume="44",
number="523",
pages="563-563",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-1285",
doi="",
url="http://dx.doi.org/"
}