Combretum microphyllum and Leucospermum erubescens inhibit the genotoxic effects of 4-NQO, MMC and EMS in vitro, Makhafola, T.J., Elgorashi E.E., McGaw L.J., Verschaeve Luc, and Eloff J.N. , The All Africa Congress on Basic and Clinical Pharmacology (ACP2012) , 0/0/2012, Issue Dept.Pharmacology,Univertsity of Pretoria, Pretoria, (2012)