Template:Liede-Schumann & Meve, 2006
- Liede-Schumann, S. & Meve, U. 2006. Calciphila, a new genus in African Asclepiadeae (Apocynaceae, Asclepiadoideae), and taxonomic rectifications in Cynanchum. Novon 16(3): 368–373. DOI: 10.3417/1055-3177(2006)16[368:CANGIA]2.0.CO;2 BHL