“In Vitro Antioxidant Properties of Methanolic Leaf Extract of Vernonia Amygdalina Del” (2021) Nigerian Journal of Physiological Sciences, 29(2), p. 091–101. Disponível em: http://ojshostng.com/index.php/njphysiologicalsciences/article/view/1814 (Acesso em: 22 maio 2026).