PRATAMA, Muhammad Isbar. Analisis Portofolio Saham Syariah Menggunakan Pendekatan Model Markowitz. GAUSS: Journal of Mathematics, Statistics, and Mathematics Education, [S. l.], v. 1, n. 1, p. 1–11, 2025. Disponível em: https://journal.ininnawaparaedu.com/jmsme/article/view/295. Acesso em: 11 jan. 2026.