Ngcobo, M., N. Gqaleni, P. K. Paul K. Chelule, M. Serumula, and A. Assounga. “THE IMMUNOMODULATORY EFFECTS OF SUTHERLANDIA FRUTESCENS EXTRACTS IN HUMAN NORMAL PERIPHERAL BLOOD MONONUCLEAR CELLS”. African Journal of Traditional, Complementary and Alternative Medicines, vol. 9, no. 3S, Jan. 2012, pp. 40-46, https://athmsi.org/journals/index.php/ajtcam/article/view/1492.