1. Ministry of Health, Labor and Welfare Official Web Site, “Physically handicapped child and person field study result,” http://www.mhlw.go.jp/houdou/2002/08/h0808-2b.html, 2002.
2. Yobotics, “RoboWalker,” http://www.yobotics.com/robowalker.
3. S. Lee, and Y. Sankai, “Power Assist Control for Walking Aid with HAL-3 Based on EMG and Impedance Adjustment around Knee Joint,” IROS, pp. 1499-1504, 2002.
4. H. Kawamoto, and Y. Sankai, “Power assist control for leg with hal-3 based on virtual torque and impedance adjustment,” Proc. of IEEE SMC, TP1B3 (CD-ROM), 2002.
5. K. Ikeda, T. Iwatsuki, and S. Kajita, “Basic Study on an Ambulatory Apparatus with Weight Bearing Control,” Journal of Mechanical Engineering Laboratory, Vol.52, No.4, pp. 1-8, 1998.