Kazuki Yamanaka Masayuki Kanbara Naokazu Yokoya Localization of Walking or Running User with Wearable 3D Position Sensor. 39-45 2007 conf/icat/2007 ICAT http://doi.ieeecomputersociety.org/10.1109/ICAT.2007.36 db/conf/icat/icat2007.html#YamanakaKY07