Trichodiadema pygmaeum L.Bolusin J. S. African Bot. 32: 335. 1966 sec. Niesler 20171 wfo-0001294434
1.Niesler, I. M. 2017: Trichodiadema, pp. 1257-1276. – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: Springer