Setiawan, Ezra Putranda, and Dedi Rosadi. 2019. “Model Pengoptimuman Portofolio Mean-Variance Dan Perkembangan Praktisnya”. Jurnal Optimasi Sistem Industri 18 (1):8-16. https://doi.org/10.25077/josi.v18.n1.p8-16.2019.