Hafeez, H., C. A. Abbas, and M. U. Khan. “Improved Recognition of Hand-Written Digits Using Convolutional Neural Network (CNN)”. University of Wah Journal of Science and Technology (UWJST), Vol. 5, no. 1, Dec. 2021, pp. 28-33, https://uwjst.org.pk/index.php/uwjst/article/view/69.