Saputra, Keysha Salsabila, Nora Amelda Rizal, and Astire Krisnawati. “Optimal Portfolio Analysis of Listed Companies in IDX 30”. KnE Social Sciences 9, no. 14 (May 3, 2024): 787–798. Accessed July 26, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/16144.