SARTIKA, S. Stock portfolio and optimal return. The Contrarian : Finance, Accounting, and Business Research, [S. l.], v. 2, n. 2, p. 28–35, 2023. DOI: 10.58784/cfabr.24. Disponível em: http://jurnal.ywnr.org/index.php/cfabr/article/view/24. Acesso em: 28 oct. 2025.