Yosmar S, Damayanti S, Febrika S. LQ45 Stock Portfolio Selection using Black-Litterman Model in Pandemic Time Covid-19. IJSA [Internet]. 2021 Jun. 30 [cited 2024 Nov. 22];5(2):343-54. Available from: https://stat.ipb.ac.id/journals/index.php/ijsa/article/view/823