@article{ref1,
title="Distance and velocity meter for human motion analysis",
journal="Medical and biological engineering and computing",
year="1994",
author="Nakamura, T. and Yamamoto, Yusuke and Yamamoto, Takashi and Tsuji, H.",
volume="32",
number="1",
pages="115-118",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0140-0118",
doi="",
url="http://dx.doi.org/"
}