Ssemakalu, C. C., Razwinani, M., Maepa, M. J. and Motaung, K. S. (2015) “PTEROCARPUS ANGOLENSIS CRUDE EXTRACTS INDUCE THE EXPRESSION OF COLLAGEN TYPE II IN ARTICULAR CARTILAGE IN VITRO”, African Journal of Traditional, Complementary and Alternative Medicines, 13(1), pp. 76–84. doi: 10.21010/ajtcam.v13i1.11.