LAN, Jingtian. Risk-Return Dynamics of Frontier Markets: Insights from Modern Portfolio Theory. Frontiers in Sustainable Development, [S. l.], v. 5, n. 8, p. 81–88, 2025. DOI: 10.54691/ecf92f51. Disponível em: https://fsdjournal.org/index.php/ojs/article/view/165. Acesso em: 12 may. 2026.