1. Contraceptive plant drugs;Brondegaard;Planta Med,1973
2. Eienskappe van die pil in gannabos;Maritz;Dagbreek en Landstem,1969
3. “Grootlamsiekte,” a specific syndrome of prolonged gestation in sheep caused by a shrub, Salsola tuberculata (Fenzl ex Moq) Schinz var. tomentosa C. A. Smith ex Aellen;Basson;Onderstepoort J Vet Res,1969
4. Natural products affecting the gestation period of sheep and their mode of action;van der Merwe;S Afr J Sci,1976