Odeleye, O., A. Oyedeji, and A. Opoku. “PHENOLIC CONTENT AND ANTIOXIDANT ACTIVITY OF BERKHEYA BERGIANA LEAVES”. African Journal of Traditional, Complementary and Alternative Medicines, vol. 6, May 2009, pp. 419-20, https://athmsi.org/journals/index.php/ajtcam/article/view/821.