NAZLI, Ajraini; RAKHMADI, Arwin Juli; HIDAYAT, Muhammad; PUTRAGA, Hariyadi. Penentuan Kemunculan Fajar Subuh Menggunakan Nilai Kecerlangan Langit di OIF UMSU dengan Metode Fitting Polinomial Orde 4. MUST: Journal of Mathematics Education, Science and Technology, [S. l.], v. 8, n. 1, p. 48–56, 2023. DOI: 10.30651/must.v8i1.18025. Disponível em: https://journal.um-surabaya.ac.id/matematika/article/view/18025. Acesso em: 29 sep. 2026.