Isoda, Masami. “Figural Representations on Theory of Mathematical Representations: Operational Diagram and Ways to See”. Journal of Thailand Society of Mathematics Education 1, no. 1 (September 18, 2026): # 29 – 52. accessed September 29, 2026. https://so11.tci-thaijo.org/index.php/JTSMEd/article/view/4264.