Arifin, Zaenal, and Ebenezer Bonyah. “Tracing the Roots of Error: A Polya Method Analysis on Student Problem Solving in Curved Surface Solids”. International Journal of Geometry Research and Inventions in Education 1, no. 1 (June 3, 2024): 21–30. Accessed December 21, 2025. https://journals.eduped.org/index.php/Gradient/article/view/1144.