Evaluation of the cancer specificity of intracellular events caused by 2-methoxyestradiol-bis-sulphamate and aqueous Sutherlandia frutescens extracts - Vorster, C.J.J.; Joubert, A. (Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / South African Journal of Science and Technology, 2013)