Optimasi Portofolio Menggunakan Metode Mean-Variance dengan L1-Regularization Saham Jakarta Islamic Index (JII). Journal of Mathematics UNP, [S. l.], v. 10, n. 4, p. 16–25, 2026. DOI: 10.24036/0h0dz724. Disponível em: https://jom.ppj.unp.ac.id/index.php/jom/article/view/77. Acesso em: 2 mar. 2026.