Factors influencing Petrobras Stock Prices (PETR4) between 2009 and 2020. Research, Society and Development, [S. l.], v. 10, n. 7, p. e13410716294, 2021. DOI: 10.33448/rsd-v10i7.16294. Disponível em: https://www.rsdjournal.org/rsd/article/view/16294. Acesso em: 5 dec. 2025.