1.
Mathematical Concept Teaching Design based on APOS Theory in the Context of Mathematical History: A Plane Rectangular Coordinate System as an Example. J. Teach. Learn. Elem. Educ. [Internet]. 2024 Aug. 1 [cited 2025 Oct. 14];7(2):172-9. Available from: https://jtlee.ejournal.unri.ac.id/index.php/JTLEE/article/view/54