RUMA, Z.; TAWE, A. OPTIMAL PORTFOLIO CRITICAL REVIEW OF BASIC MATERIAS SECTOR SHARES ON THE IDX USING THE MARKOWITZ APPROACH. Journal of Economics,Education,Business and Managements, [S. l.], v. 1, n. 3, p. 276–287, 2023. Disponível em: http://pemudin.com/index.php/JEEBM/article/view/24. Acesso em: 6 dec. 2024.