Rahmadi, Melasarah Deswita, et al. “Business Index 27 Stock Portfolio Optimization Using the Black Litterman Model Accompanied by Value At Risk Calculation: Bahasa Indonesia”. Jurnal Matematika, Statistika Dan Komputasi, vol. 21, no. 1, Sept. 2024, pp. 136-4, doi:10.20956/j.v21i1.36306.