Smith, G. F. (2022).

Notes on Kalanchoe subg. Bryophyllum (Crassulaceae subfam. Kalanchooideae) and the kalanchoes of Sijfert H. Koorders (1919)

. Phytotaxa, 549(1), 87–96. https://doi.org/10.11646/phytotaxa.549.1.7