Biapa, P.-C. N., G. A. Agbor, J. E. Oben, and J. Y. Ngogang. “PHYTOCHEMICAL STUDIES AND ANTIOXIDANT PROPERTIES OF FOUR MEDICINAL PLANTS USED IN CAMEROON”. African Journal of Traditional, Complementary and Alternative Medicines, vol. 4, no. 4, June 2007, pp. 495 -, https://journals.athmsi.org/index.php/ajtcam/article/view/273.