RATRI, A. V. D. K. Analisis Portofolio Optimum Saham Syariah Dengan Model Black Litterman. Jurnal Fourier, [S. l.], v. 4, n. 1, p. 1–15, 2015. DOI: 10.14421/fourier.2015.41.1-15. Disponível em: https://fourier.or.id/index.php/FOURIER/article/view/31. Acesso em: 2 feb. 2026.