Mohd Aris, T. N., M. Y. Mohd Saman, M. N. Sulaiman, and M. Othman. “Parallel Implementation on Improved Error Signal of Backpropagation Algorithm”. Malaysian Journal of Computer Science, vol. 15, no. 2, Sept. 2017, pp. 1-16, https://adum.um.edu.my/index.php/MJCS/article/view/6049.