PUTRA, R. A. P. .; CHAMPACA, M. Portfolio optimization using cryptocurrency. Priviet Social Sciences Journal, [S. l.], v. 6, n. 1, p. 410–418, 2026. DOI: 10.55942/pssj.v6i1.620. Disponível em: http://journal.privietlab.org/index.php/PSSJ/article/view/620. Acesso em: 21 jan. 2026.