Asaad, Renas Rajab, and Rasan Ismail Ali. “Back Propagation Neural Network(BPNN) and Sigmoid Activation Function in Multi-Layer Networks”. Academic Journal of Nawroz University 8, no. 4 (November 20, 2019): 216–221. Accessed April 26, 2024. https://journals.nawroz.edu.krd/index.php/ajnu/article/view/464.