Ismail, Mahmud Rasheed, and Imad Zuhair Ghani. “Estimating Transfer Function of Below-Knee Prosthesis at Two Phases of Gait Cycle”. Al-Nahrain Journal for Engineering Sciences, vol. 20, no. 3, June 2017, pp. 770-7, https://nahje.com/index.php/main/article/view/294.