A framework for sensorless torque estimation and control in wearable exoskeletons. - Barkan Ugurlu; Masayoshi Nishimura; Kazuyuki Hyodo; Michihiro Kawanishi; Tatsuo Narikiyo (AMC, 2012)

Proof of Concept for Robot-Aided Upper Limb Rehabilitation Using Disturbance Observers. - Barkan Ugurlu; Masayoshi Nishimura; Kazuyuki Hyodo; Michihiro Kawanishi; Tatsuo Narikiyo (IEEE Trans. Hum. Mach. Syst., 2015)