Widyastuti, W, and A Hasanah. “The 10th Grade Students’ Folding Back Process in Solving Contextual Mathematical Problem”. International Conference on Elementary Education 2, no. 1 (March 4, 2020): 1079-1098. Accessed July 10, 2025. https://proceedings2.upi.edu/index.php/icee/article/view/721.