DEVIRA LARASATI; ARI ROHMANA; REZA MUTIARA; MARIA YOVITA R. PANDIN. Analysis of the Single Index Model and Markowitz in Optimal Portfolio Selection in the Telecommunications Sub-Sector Listed on the Indonesia Stock Exchange for the Period 2020-2022. Finance : International Journal of Management Finance, [S. l.], v. 1, n. 2, p. 71–85, 2023. DOI: 10.62017/finance.v1i2.27. Disponível em: https://ejournal.internasional.org/index.php/finance/article/view/27.. Acesso em: 12 sep. 2025.