LI, Xiaoyu. Research on the Development of Investment Portfolio Theory. Highlights in Business, Economics and Management, [S. l.], v. 40, p. 1044–1053, 2024. DOI: 10.54097/h6kdjv16. Disponível em: https://drpress.org/ojs/index.php/HBEM/article/view/24801. Acesso em: 26 jun. 2026.