M. O. Agbo, P. F. Uzor, U. N. Akazie Nneji, C. U. Eze Odurukwe, U. B. Ogbatue, and E. C. Mbaoji, “Antioxidant, Total Phenolic and Flavonoid Content of Selected Nigerian Medicinal Plants”, Dhaka Univ. J. Pharm. Sci, vol. 14, no. 1, pp. 35–41, Jun. 2015.