«Investigation of Antioxidant Compositions and Antioxidative Activities of Ethanol Extract of Alstonia Boonei Stem Bark». Nigerian Journal of Pharmaceutical Research 16, no. 1 (septiembre 30, 2020): 71–80. Accedido abril 6, 2026. https://www.ojshostng.com/index.php/njpharmaceuticalsciences/article/view/895.