«In Vitro Antioxidant Properties of Methanolic Leaf Extract of Vernonia Amygdalina Del» (2021) Nigerian Journal of Physiological Sciences, 29(2), p. 091–101. Disponible a: http://ojshostng.com/index.php/njphysiologicalsciences/article/view/1814 (Consulta: 2 juliol 2026).