Raharjanti A. Mean-Variance Investment Without Risk-Free Assets in PT Company Shares PT Ace Hardware (Aces.Jk), PT Mayora Indah (Myor.Jk), PT Bri (Bbri.Jk), PT Siloam Hospital (Silo.Jk), PT Eterindo Wahanatama (Etwa.Jk). Orics [Internet]. 2023 Sep. 6 [cited 2026 Jan. 14];4(3):105-8. Available from: https://www.iorajournal.org/index.php/Orics/article/view/251