Analysis of the impact of Operation Lava Jato on Petrobras stocks: a statistical approach based on the news. Research, Society and Development, [S. l.], v. 12, n. 4, p. e27312441209, 2023. DOI: 10.33448/rsd-v12i4.41209. Disponível em: https://rsdjournal.org/rsd/article/view/41209. Acesso em: 5 dec. 2025.