P. M. T. Napitupulu and F. L. Situngkir, “Transforming mathematical representations: A process-based analysis of junior high school students’ problem solving”, Eduvista, vol. 1, no. 1, pp. 43–56, Jul. 2026, Accessed: Jul. 24, 2026. [Online]. Available: https://perfidiajournal.com/index.php/eduvista/article/view/16