HIDAYAT, Agustyan; ISWARI, Ni Made Satvika. Rancang Bangun Spaced Repetition Software untuk Menghafal Huruf Jepang Menggunakan Algoritma Supermemo 2 Berbasis IOS. Ultima InfoSys : Jurnal Ilmu Sistem Informasi, [S. l.], v. 9, n. 1, p. 32–36, 2018. DOI: 10.31937/si.v9i1.846. Disponível em: https://ejournals.umn.ac.id/index.php/SI/article/view/846. Acesso em: 15 jul. 2025.