AKTAMOVICH, Saipnazarov Shaylavbek; SHAYLAVBEKOVICH, Saipnazarov Sherbek. About Portfolio Theory Models. International Journal on Economics, Finance and Sustainable Development, [S. l.], v. 3, n. 12, p. 38–44, 2021. DOI: 10.31149/ijefsd.v3i12.2466. Disponível em: https://journals.researchparks.org/index.php/IJEFSD/article/view/2466. Acesso em: 3 nov. 2026.