Smith, G. F., & Figueiredo, E. (2020).

The nomenclature and taxonomy of Kalanchoe nyikae (Crassulaceae subfam. Kalanchooideae), a little-known species from East Africa

. Phytotaxa, 454(2), 153–158. https://doi.org/10.11646/phytotaxa.454.2.7