(1)
Smith, G. F. The Classification of the Southern and South-Tropical African Kalanchoe [subg. Kalanchoe] Sect. Raveta (Crassulaceae Subfam. Cotyledonoideae) Expanded and Refined: Description of K. [sect. Raveta] Ser. Paniculatae, K. [sect. Raveta] Ser. Alticolae, K. [sect. Raveta] Ser. Leblanciae, K. [sect. Raveta] Ser. Humiles, and K. [sect. Raveta] Ser. Elizae. Phytotaxa 2025, 726, 125-142.