Md Yusoh, Muhammad Afif, and Mohamad Firdaus Ab. Aziz. “UPSR Math Learning Application for Improving Students’ Understanding”. Applied Information Technology And Computer Science, vol. 3, no. 1, June 2022, pp. 388-99, https://publisher.uthm.edu.my/periodicals/index.php/aitcs/article/view/2172.