Smith, G. F. “Revisiting the Nomenclature and Taxonomy of the Malagasy Kalanchoe fedtschenkoi, and Description of K. fedtschenkoi Var. boiteaui (Crassulaceae Subfam. Kalanchooideae)”. Phytotaxa, vol. 645, no. 2, Apr. 2024, pp. 99-119, doi:10.11646/phytotaxa.645.2.1.