IRWAN, Irwan; ABDY, Muhammad; SALSABILA, Nurul Khofifah; AHMAR, Ansari Saleh. Analysis of Stock Portfolio Optimization in the Telecommunications Sector Using the Single Index Model. ARRUS Journal of Mathematics and Applied Science, [S. l.], v. 3, n. 1, p. 1–10, 2023. DOI: 10.35877/mathscience1734. Disponível em: https://journal.arrus.id/index.php/mathscience/article/view/1734. Acesso em: 27 apr. 2026.