Bruyns, P. V., Klak, C., & Hanáček, P. (2018).

An account of Ceropegia sect. Chamaesiphon (Apocynaceae) in Moçambique with new records and two new species

. Phytotaxa, 364(2), 111–135. https://doi.org/10.11646/phytotaxa.364.2.1