Bagus Yosia Wiryakusuma, I Gusti. “Analysis of Optimal Portfolio Performance Comparison on Companies Listed in LQ45 Index and Companies Unregistered in LQ45 Index”. KnE Social Sciences 4, no. 3 (February 6, 2020): 250–261. Accessed August 11, 2020. https://knepublishing.com/index.php/KnE-Social/article/view/6410.