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Oktavianus Yusan B, Riyadi S. Portfolio Optimization: Application and Comparison of Markowitz Model and Single Index Model on LQ45 Stocks in Indonesia Stock Exchange. IJMSA [Internet]. 2024 Feb. 13 [cited 2024 Sep. 17];3(1):57-85. Available from: https://ejournal.sultanpublisher.com/index.php/ijmsa/article/view/210