Mas’ud, Syamsuddin. “Catatan Terhadap Turunan Fungsi Bernilai Real Pada Ruang Metrik Diskrit”. Jurnal Diferensial 6, no. 2 (November 1, 2024): 188-192. Accessed November 15, 2024. https://ejurnal.undana.ac.id/index.php/JD/article/view/17392.