@article{ref1,
title="Head impact rotational measurements and frequency response",
journal="Journal of biomechanics",
year="1980",
author="Hu, A. S.",
volume="13",
number="7",
pages="615-622",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-9290",
doi="",
url="http://dx.doi.org/"
}