SUBHAN, Subhan Khalif Azis; NURSYAHRANA, Putri; ALFIAH, Sitti Husni. Pembentukan Portofolio Pada Saham Industri Batu Bara BEI Menggunakan Model Markowitz. Journal of Mathematics, Statistics and Applications, [S. l.], v. 1, n. 1, p. 42–51, 2024. DOI: 10.61220/jmsa.v1i1.20241.511. Disponível em: https://journal.lontaradigitech.com/index.php/LJMSA/article/view/511. Acesso em: 9 dec. 2025.