Mahyuddin, A. I., F. Ferryanto, I. Herman, S. Mihradi, and T. Dirgantara. “Development of a 3D Gait Measurement Protocol for Amputees Walking on Treadmill”. Mesin, vol. 26, no. 1, Apr. 2017, pp. 29-39, doi:10.5614/MESIN.2017.26.1.4.