@article{ref1,
title="Firearm sound suppressor",
journal="Journal of the Acoustical Society of America",
year="2013",
author="Shults, Jonathon and Ut, Sandy",
volume="133",
number="1",
pages="607-607",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0001-4966",
doi="10.1121/1.4774161",
url="http://dx.doi.org/10.1121/1.4774161"
}