TOSELLI, Bruno; BIASE, Nadia Giaretta. Time series analysis: a study of the stock exchange investment portfolio of the companies Petrobras, Banco do Brasil, Vale and Ambev. Sigmae, [S. l.], v. 13, n. 5, p. 40–57, 2024. Disponível em: https://publicacoes.unifal-mg.edu.br/revistas/index.php/sigmae/article/view/2464. Acesso em: 8 jan. 2025.