Trichodiadema subg. Trichodiadema
- 1. Niesler, I. M. 2001 – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae F – Z. – Berlin, Heidelberg & New York: Springer, 2. Niesler, I. M. 2017: Trichodiadema, pp. 1257-1276. – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: Springer