“Implementation of Project-Based Learning Model on Local Wisdom in Number Theory”. Jurnal Mercumatika : Jurnal Penelitian Matematika dan Pendidikan Matematika 6, no. 2 (November 3, 2022). Accessed June 30, 2026. https://ejurnal.mercubuana-yogya.ac.id/index.php/mercumatika/article/view/2312.