Osman, Khairuddin, Ahmad ’Athif Mohd Faudzi, M.F. Rahmat, Chai Chang Kai, and Koichi Suzumori. 2018. “Design and Development of Ankle-Foot Rehabilitation Exerciser (AFRE) System Using Pneumatic Actuator”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 10 (2-8):137-43. https://jtec.utem.edu.my/jtec/article/view/4476.