HENDRA, J.; HUDZAFIDAH, K.; CHAMDANAH, S. Formation of Optimal Portfolio Using Single Index Model in Investment Decisions. Wiga : Jurnal Penelitian Ilmu Ekonomi, [S. l.], v. 11, n. 2, p. 128–137, 2021. DOI: 10.30741/wiga.v11i2.712. Disponível em: http://ejournal.itbwigalumajang.ac.id/index.php/wiga/article/view/712. Acesso em: 27 apr. 2024.