WYANOV, U.; GANDAKUSUMA, I. Optimal Portfolio Formation Analysis vs. Single Index Model: 2018–2019 Before Crisis and 2020–21 During Crisis. Jurnal Manajemen Bisnis, [S. l.], v. 10, n. 2, p. 588–596, 2023. DOI: 10.33096/jmb.v10i2.576. Disponível em: https://jurnal.fe.umi.ac.id/index.php/JMB/article/view/576. Acesso em: 16 may. 2025.