Wahyuningrum AS, Suryadi D, Turmudi. Students’ Prior Knowledge as an Ontogenic Obstacle on the Topic of Ratio and Proportion. j. pend. mat. [Internet]. 2024 Oct. 15 [cited 2025 Apr. 3];17(1):55-68. Available from: https://jpm.ejournal.unsri.ac.id/index.php/jpm/article/view/180