GUSLIANA, Shindi Adha; SALIH, Yasir. Mean-Variance Investment Portfolio Optimization Model Without Risk-Free Assets in Jii70 Share. Operations Research: International Conference Series, [S. l.], v. 3, n. 3, p. 101–106, 2022. DOI: 10.47194/orics.v3i3.185. Disponível em: https://www.iorajournal.org/index.php/Orics/article/view/185. Acesso em: 14 jan. 2026.