Nor Azmi Ab Patar, Mohd, et al. “Low Cost Monitoring System of Ground Reaction Force During Normal Gait Cycle for Motion Control and Analysis of Active Ankle Foot Orthosis”. International Journal of Engineering & Technology, vol. 7, no. 4.26, Nov. 2018, pp. 318-21, https://doi.org/10.14419/ijet.v7i4.26.28568.