1. (3) H. Minakata: “A Study of Leg Extender Exoskeleton with Active Ankle Joint”, IEEJ Trans. IA, Vol. 134, No. 3, pp. 252-257 (2014-3) (in Japanese)
2. (4) H. Minakata: “A Study of Leg Extender Exoskeleton Discussion about Manipulability and Link Length Configuration”, AMC2014-Yokohama, pp. 326-331 (2014-3)
3. (6) H. Kazerooni and R. Steger: “The Berkeley Lower Extremity Exoskeletons”, ASME Journal of Dynamics Systems, Measurements and Control, Vol. 128, pp. 14-25 (2006)
4. (7) “Team Skeletonics”, http://skeletonics.seesaa.net (2011)