D. Penduka, N. Gasa, M. Hlongwane, R. Mosa, F. Osunsanmi, and O. A.R., “THE ANTIBACTERIAL ACTIVITIES OF SOME PLANT DERIVED TRITERPENES”, Afr J Tradit Complement Altern Med, vol. 12, no. 6, pp. 180–188, Sep. 2015.