Usman, Agustian, Perry Zakaria, and Khardiyawan A.Y. Pauweni. “Peningkatan Penalaran Matematika Melalui Problem Based Learning Pada Materi Relasi Dan Fungsi”. Research in the Mathematical and Natural Sciences 4, no. 2 (August 21, 2025): 121–125. Accessed January 31, 2026. https://journal.scimadly.com/index.php/rmns/article/view/269.