ALIYU, A. B.; AJIBOLA, O. J.; MUNTAKA, S. M.; GWARZO, U. S.; GARBA, Z. N.; OYEWALE, A. O. Heavy metals and mineral elements of Vernonia ambigua, Vernonia oocephala and Vernonia purpurea used in northern nigerian traditional medicine. Vitae, [S. l.], v. 22, n. 1, p. 27–32, 2015. DOI: 10.17533/udea.vitae.v22n1a03. Disponível em: https://revistas.udea.edu.co/index.php/vitae/article/view/19504. Acesso em: 19 jan. 2022.