ELLY SUSANTI; NELLY ERVINA; ERNEST GRACE; LIPER SIREGAR. Comparison Analysis Of Optimal Portfolio Formation Results Using Single Index Model With Markowitz Model During The Covid 19 Pandemic In LQ 45 Index Company. International Journal of Educational Research & Social Sciences , [S. l.], v. 2, n. 5, p. 1146–1156, 2021. DOI: 10.51601/ijersc.v2i5.177. Disponível em: https://ijersc.org/index.php/go/article/view/177. Acesso em: 7 nov. 2024.