Trichodiadema obliquum L.Bolusin J. S. African Bot. 27: 122. 1961 sec. Niesler 20171 wfo-0001294428
1.Niesler, I. M. 2017: Trichodiadema, pp. 1257-1276. – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: Springer