Wahyuningrum, Ayunda Sri, Didi Suryadi, and Turmudi. 2024. “Students’ Prior Knowledge As an Ontogenic Obstacle on the Topic of Ratio and Proportion”. Jurnal Pendidikan Matematika 17 (1):55-68. https://jpm.ejournal.unsri.ac.id/index.php/jpm/article/view/180.