Smith, G. F., Klein, D.-P., & Shtein, R. (2021). A revision of the Malagasy Kalanchoe subg. Kitchingia (Crassulaceae subfam. Kalanchooideae): history, taxonomy, and nomenclature. Phytotaxa, 507(1), 67–80. https://doi.org/10.11646/phytotaxa.507.1.3