Pan, Claudine Marie, and Vanessa Jane Lim. “Arith-O-Matic: An Arithmetic Interactive Machine”. International Journal of Sustainability and Advanced Integrated Research 2, no. 2 (May 5, 2026): 1561–1567. Accessed September 9, 2026. https://ijsair.com/index.php/ijsair/article/view/422.