Daisuke Chugo Wataru Matsuoka Songmin Jia Kunikatsu Takase Hajime Asama Standing Assistance System for Rehabilitation Walker. 541-550 2007 FSR http://dx.doi.org/10.1007/978-3-540-75404-6_52 conf/fsr/2007 db/conf/fsr/fsr2007.html#ChugoMJTA07