World of Succulents, Succulentopedia. Ceropegia sandersonii (Paracute Plants). https://worldofsucculents.com/Ceropegia-sandersonii-parachute-plant/. Accessed on 5 Nov. 2019.
http://pza.sanbi.org/references/world-succulents-succulentopedia-ceropegia-sandersonii-paracute-plants