Medicinal plants sold in open fairs of State of Piauí, northeastern Brazil. Research, Society and Development, [S. l.], v. 10, n. 9, p. e25910917948, 2021. DOI: 10.33448/rsd-v10i9.17948. Disponível em: https://rsdjournal.org/rsd/article/view/17948. Acesso em: 5 dec. 2025.